Even nuclear advocate's argument that "nuclear plants are much safer now and the accidents that happened at 3 Mile Island/Chernobyl/Fukushima are impossible now

Even nuclear advocate's argument that "nuclear plants are much safer now and the accidents that happened at 3 Mile Island/Chernobyl/Fukushima are impossible now" implies that anti-nuclear sentiment was correct in the 1960's, 70's, 80's, 90's and early 2000s at the very least! Every nuclear disaster so far has been unique, and this will remain the case going forward, because the nuclear sector is always defending against yesterday’s failure mode. Nuclear power plants are some of the most complicated machines mankind has ever built. In such a complex design there are too many permutations of failures that can arise to allow for designing away all risk. We need to fundamentally accept this risk and embrace it if we are going to adopt nuclear power on a grander scale. This is a big ask on a psychological level for humanity, and that’s one reason why I think a nuclear upscaling is not going to happen. (The other is high and rising cost of construction, which is the biggest problem facing the nuclear power sector that is on them to solve.)