I don't think the concern should really be "would he make a reactor successfully?", but "would he make an even larger mess than his pile of radioactive materials amounted to?".

> succeeded in making a real reactor

The concern here is not if an amateur attempt to make a reactor, hack a bank, bioengineer a medicine/poison is successful or not. Interactive and instructive access to some forms of knowledge used to come with discretion along side instruction.

Yes, perhaps your swearing at me in this context is a little hysterical

prompt -> LLM -> flying car should be just around the corner guys!