Eric, I am not sure they were higher safety standards as such (in the main) but probably similar or lower in many instances.
What has changed is, in my opinion, that we have made things often safer to the extent people tend not to take as much care themselves to mitigate risks because of such and the outcome combined can be a less safe position than previous.
Indeed - and, in any event, as I said, with the exception of the 'speed limit' example which eric cited, I struggle to think of any other situation in which there has been a 'relaxation' of safety standards since the 'bygone days' (an increase in speed limits, when cars came along) followed by a subsequent return in the direction of those 'bygone days' (more recent reductions in some urban speed limits).
As I keep saying, what has happened is that 'they', without any consultation with 'us', have decided that 'we' are no longer to accept the risks which we happily lived with in the poast. In some cases, they undoubtedly have correctly decided that we now want 'less risk' - but in (many) other cases ..... !!
Since time itself, some people have taken a attitude "it`s only 5 amps (5A rewireable fuse)" so do not take as much care as they should do to not touch it. Nowadays the "Oh I`m OK it has a 30mA RCD so I am safe" creeps in. ... In practice, nowadays, those people who might have taken care previously, do not take as much care now. ... Result, higher potential danger.
Yep, reduction in risk can indeed lead to complacency, which may actually have the overall effect of increasing the residual risk to an individual. It's not uncommon hearing people in 'hazardous occupations' saying that they would be very worried if they day ever came when they were not frightened by some of the situations they have to face - since it is that very fear which 'keeps them on their toes', safety-wise.
There are very very few 'protective measures' which give "100% protection", but some people don't seem to understand that. We saw some of that when people started receiving Covid vaccine - after they had received vaccine, some people appeared to assume that they no longer needed to take any (essentially common-sense) measures to reduce their risk of infection - ans that somewhat disported some of the early data relating to the efficacy of the vaccines (obviously never expected to be "100% protection")
Eric himself often tells us that, in the days when RCDs were uncommon, he had one fitted when his son started 'playing with electrical/electronic things'. Whilst that was undoubtedly well-intentioned, since human nature is as it is, that probably meant that, 'reassured by the RCD', his son was probably sometimes somewhat ';less careful' than he would have been had that 'protection' not been installed.
Kind Regards, John