I have yet to see an argument against them that isn't more than personal disgust

How hard are you looking? "I haven't seen arguments" doesn't mean much if you're not looking for them. You might as well have had a blindfold on. It's as meaningful as saying "I haven't seen arguments as to why Rust eliminates memory safety bugs."

Here's an example: https://www.ncbi.nlm.nih.gov/books/NBK230628/

This is another excellent article that discusses some of the problems, and has links to other such articles: https://www.wsj.com/finance/investing/polymarket-kalshi-bett...