They probably are aware of nuclear waste and of the modalities of dealing with it, and still believe that not investing into nuclear is shooting yourself in the foot.
FYI, a typical 1GW nuclear plant produces 30 tons, or 10m3, of high-level waste. Germany uses ~500TWh of electricity per year. So Germany could replace all their electricity generation with 60 nuclear plants and would need to find space for 1800 tons or 5km3 of waste per year.
For comparison, German landfills can accommodate 70M metric tons per year.
France, a country famous for its investment into nuclear, is not covered in nuclear waste, and does not seem to have any issue disposing of it safely.
Nuclear has its disadvantages, but painting the many people who advocate for it on HN as delusional or ignorant is not very respectful.
Solar doesn’t produce that much waste either and that was the point. Just because you don’t see the nuclear waste doesn’t mean it isn’t sitting there somewhere. The person was acting as if clean energy is dirty via its waste. For the record I’m all for nuclear - it’s insane we’ve regressed so much and not invested into more. But it’s also insane we’re not taking more advantage of green energy where we can.
How many tons does it take to make a dirty bomb that irradiates a city center or small downtown? To poison an aquifer when storage fails? How much does it cost to make sure neither of these events, or any other similar hypothetical, doesn't happen, not even once?