The regulation is there for a reason, but it doesn't have to be a sensible or proportionate reason. Nuclear power is held to a ludicrously higher safety standard than fossil. You are right to suspect that business interests had a hand in subverting nuclear power - the issue is that while nuclear was getting off the ground, the fossil fuel industry was already well established and integrated with government. The anti-nuclear movement wasn't the ultimate cause, but it allied public opinion with a business interest it should have been viciously fighting.