> You really think Governor DeSantis going to start throwing random teachers in prison, because they had non-controversial but not technically approved books in their classrooms?
Yes.
> Like him or loathe him, he’s a pretty smart politician, why would he engage in such an act of political self-sabotage?
If you can construct a plausible enough lie, the truth doesn't matter to his supporters anyways. See for example the anti-CRT rhetoric--where something as basic as "our founding fathers were individuals with complex, self-contradictory beliefs" is considered racial indoctrination because it doesn't say that the US is the bestest country to have ever existed. Or of course school board hearings involving people screaming over litter boxes.
All it takes is for one parent to get angry--and if you're involved with school politics, you'll know that parents getting angry is basically guaranteed--about one book, and that'll be enough for a politician to do something performative. And DeSantis is good at being performative.