Death by burning from an exploding battery from an uninspected, poorly-mainteained car in the garage of your shared low-rent apartment building is also a regressive tax.
Battery fires usually happen after collisions too. Fires while charging are rare but they grab headlines because they're novel.
I think trying to use inspections to solve that is a case of barking up a really stupid tree. In the case of EV charging fires there's not really much a mechanic can inspect that some electronics cobbled onto the pack couldn't. In the case of battery pack damage an annual inspection isn't going to do much good since most of those cases will cause problems before that or not at all.
I'll take the inspections.