Nuclear weapons are barely relevant to the conversation other than that they also use fissile material.
>accidental bombing of a nuclear power plant won't result in a mushroom cloud
Yes... as I stated.
>Nuclear plants are not weapons of war and they serve no military purpose
That's incorrect. Once again, the Zaporizhzhia NPP has played quite a large role in the war in that region. Whether Russia intends to do anything is irrelevant, the threat implicitly limits Ukraine's military response. The plant itself can, and has been used as a military outpost, shielded from intense bombing.
Not only all this, but the loss of the power plant to Russia meant Ukraine lost 20% of it's total electricity generation at all once[0]. From an energy security POV this is a disaster. This would not be possible with distributed wind turbines or solar arrays.
[0]: https://www.gem.wiki/Zaporizhzhia_nuclear_power_plant#Backgr...