There is room between under-regulation and over-regulation.
Given that we are experiencing high costs and other barriers to construction, we can do at least two things: reduce red tape where it makes sense or where the risk is acceptable to help lower costs, or the US government can, through a variety of mechanisms ranging from basic research funding to direct subsidies, spend taxpayer money to try and alleviate costs.
Given that we supposedly (and I agree) need to build nuclear reactors to help power our country and given that we aren’t building them, we can optionally use both levers to encourage construction. There seems to be this mind virus that has infected many people on the internet that seem to think that regulations are a moral good, and so having more of them must be more good.
This is not accurate.
Regulations are simply a tool we can wield to achieve desired outcomes within various risk and need-based calculations. More regulations can be good, for example we should ban highway billboards- that would be a good regulation. Or we can eliminate regulations - allow businesses to build more housing using pre-approved designs that meet existing zoning code. Neither is good or bad, except in that it helps to achieve some aim that society has.
The regulation or lack there of, of nuclear energy in the United States has absolutely nothing to do with Boeing airlines screwing up some plane designs. Drawing a conclusion that nuclear energy must be regulated (it is) or over-regulated (it probably is or else we would build more), because of a belief that Boeing airliners weren’t regulated enough is, to put it lightly, nonsense, and you are mistakenly using the application of some regulation or lack of causing some bad things to happen, to imply that more regulation in another area would mean good things happen through this framework of regulation == good.
And further, if you’re going to suggest that Boeing is effectively unregulated, which is untrue in practice and in principal, then I’d argue that was for the best given that it is a hugely successful company that employs tens of thousands of people and hundreds of millions have flown and continue to fly on their airlines every single day safely and without incident.