My main objection to smart meters is that the supply can be shut off remotely without my permission. Tariffs do not bother me, but losing the supply does because my wife needs heat light and power 24/7 no iffs or buts. Yes, we (she) have an entry on the vulnerable customer list, but I much prefer standard metering where I control the supply other than during a general area outage.
I do see your point, and until I got solar and battery I felt the same. With solar and battery, no grid supply will not automatically mean not electric, although what gets electric is reduced.
It does depend on the time of year, and the time of day as to how long I can go on with no grid supply. We would prefer power 24/7, but could not say we need power, it would involve some danger if we lose power, specially in winter, as I do not store wood in the house, loads outside, but in ice or snow going down the steps and slopes to get it, is dangerous, I have already had one fall going to reset a RCBO, which resulted in us getting extra handrails.
Be the loss of supply be due to RCBO tripping, the smart meter being turned off, or a general power cut, we know it can happen, we have in 1978-9 seen this happen with a Labour government, after the bin men went on strike, and we were turned off as a block and did not matter if one was very old or very young we lost all the heating to our house, the heating was gas, but without electric it would not work.
So we do a risk assessment, and I decided I can lose lights, sockets etc, but I need heating and the freezers to continue to run. So the solar and battery will likely keep my freezers and central heating running, and I have one spare socket for anything else. Before solar and batteries, I would have lost the contents of the freezer, and central heating, and would have needed in Winter to open up the open grate so I could burn wood.
If my wife or I had some ailment which required power, then I would clearly need a better system, a generator for example, as can not be sure when a power cut happens that there is enough in the batteries. And I would require this back up whether I have a smart meter or not. The roads around here are too steep to rely on road rescue in poor weather. If it snows, we simply don't go out.
So I am also listed as a vulnerable customer, but in real terms that does not help, we need electric for the heating to work, and if you look at the amount of power cuts due to road works, high winds, floods, etc, the amount of power cuts due to an error on which smart meter to turn off becomes insignificant, if you rely on electric power, then one needs an alternative to the grid supply.