Those attitudes live under a bowler hat, supported by an umbrella.
Times have changed since the 1950's.
Do you drive according to the road and its conditions, or do you set a speed which you decide is "safe" and be satisfied with that? If you want to go about the country at 20mph because it's unlikely to get you injured, fine, go with that advice. Happy holidays.
Some of it is very obviously rubbish:
You can be sure that an investment with high charges will do worse than a similar one with low charges.
One with a higher return will always beat one whose return is lower regardless of charges, because returns overwhelm charges.
It isn't clever to quote and rely on some bloody fool just because he's using "well astablished" advice which he will claim has been true since 70 years ago. The same sort who would tell yo uthat it's not something to worry your little head about.
"Just invest in the S&P 500" is one such silly trope. Sure it has gone up overall if you take a long enough timescale.
It went up 8% in the last 12 months. If you'd bought it at the wrong time and wanted to sell, you'd have lost 18%.
Ah but your fees would have been low so that makes it OK, ???
Someone paying a little attention would have got a multiple of that 8%.
For a long term investment in a pooled fund, once a year is plenty. If you don't trust the fund enough to do do that, find one you do trust.
The S&P 500 is the best companies in the world, a pooled fund if there ever was one. How are you supposed to know which pooled fund will be OK for a year?
Every statement in that post looks like trolling spam and should be treated as such.