Not really, some might want to carry out improvements to lower their carbon footprint/utility costs, some might not.
Yes I have done improvements. There are two main reasons, one is running costs, which will lower the carbon footprint, and the other is comfort.
So as an example, solar panels reduce running costs, but together with the battery it also ensures with a grid failure my central heating will continue to run. Where putting extra insulation in the loft, may reduce losses, but also makes the loft space unusable, so only half my loft has the extra insulation.
Heating must be a major use of energy, clearly solar panels don't really help, as in winter their output is low, but to heat only as and when required, can reduce the use by a massive amount, however the heat pump technology does not allow fast recovery times, so if we look at two homes, the old peoples home, where the rooms are all heated 24/7 and be it bedroom or living room, due to the nature of nursing care, all rooms are heated 24/7, but before those old people had to go into a home, likely their house had some rooms hardly ever used, I know my house is like that, so having programmable TRV heads for me saves me a lot of money, but in an old peoples home would likely save nothing.
And the EPC does not take into account the lifestyle of the occupants.
So the Step 1: Floor insulation (solid floor) 83 years to break even. (2 points) may be daft, but adding carpets with a thick underlay can do basically the same thing.
For an assessor to walk around in winter with a heat loss measuring gun and say you are losing a lot of heat through your walls, and you can do this or this to help is good, but cavity wall insulation assumed, basically means they have not done their job.
So for an EPC to work, it needs to be done in winter and summer, either on their own is pointless. In the last 15 years I have lived in three houses.
1) Open-plan, reasonably sized windows, main problem was heating in winter.
2) and 3) doors on the rooms, main problem was sun through the windows in summer, getting the home too hot.
So home 2) we were able to stop the overheating by planting apple trees which stopped the direct sun in the summer, problem was winter, where the leafs had fallen, so sun could heat the living room in 2 hours from 20°C to 32°C, the problem in the main was central heating reaction time, once the sun hit the bay windows, we wanted the radiator to stop heating the room as fast as possible. So two things, one was a modulating boiler, so radiators were not stinking hot to start with, and two was a fast acting electronic TRV head. But this was mainly due to bay windows to start with. However, radiators needed to store as little energy as possible, so once turned off they cooled down fast, so an electronic TRV head dropped that peak from 32°C to 25°C, it still warmed up the room, but not as much.
Move to this house, and the living room is too high for trees to stop direct sunlight, windows not quite as big, so winter, there is no problem, with this house problem is in the summer, OK lovely view,

but the living room in summer gets hot, my cure is an AC and solar panels, to keep the room cool, so costs me nothing to cool the room, but the EPC rating should be saying things like getting the reflective film put on the windows, both 2) and 3) reflective film would have helped.
But to work out what is required, needs a summer and winter visit. For any assessor to work out if growing trees will help, is really only going to happen with a visit at the crucial time.
So to in home 2) to replace the apple trees with evergreens will reduce the overheating in winter, but it would mean no apples.
Each home is unique, there is no one method suits all, and for the owner-occupier the EPC, or EICR, or any other inspection, really only tells them what in the main they already know.
Where it all changes is with rental properties, where the occupier has little option to do major changes. Be it solar panels, or central heating type, they are stuck with what the landlord has done.
However, sleeping rough can easily be the result of forcing landlords, I have seen it again and again where landlords have said enough is enough, and to jump through the government hoops is just not worth the hassle, so have sold the property, so finding a property to rent is getting harder and harder.
OK no one wants to rent property with silver fish, but that must be better than a sleeping bag in the street. In real terms around here, it means the mobile home parks, as since not a building, there are no building regulations.
So I, and I am sure many others, got a surveyors report before buying this house, so what is the point of the EPC?