Many years ago I worked at a company that had Ladbrokes in the UK as a customer. On my first visit to London, I noticed their storefronts and found them appalling. They were some of the sorriest, shabbiest public spaces I'd seen, clearly designed to extract resources from the least well off.
I don't really buy any of the arguments in favor of widespread legalization (and I include state lotteries in this). I could be ok with legalization for a few big events like the NCAA tournament because clearly there is some demand that must be met, but we should not be enabling gambling as a widespread daily habit.
Of course there will always be black market gambling and the state cannot protect its citizens from every evil, but nor should it actively enable them.
I suspect it's because unlike the lotto and games of chance, people can delude themselves into thinking they "know" the sport. It's not a gambling if they know better. It's also easy to externalize the blame for your loses "they would have won if not for <bad call, bad play, bad management, injury, weather, etc... Or combination thereof>"
You can dip your toe in betting on the obvious mismatched, where it's pretty clear who will win. This is priced into the bookmaking, so the payout is little, but this helps people convince themselves they do know the sport and chase longer odds with better payouts.
And then you get sunk cost fallacy, as they lose, they convince themselves they can win it back because they learned from before and their system will work this time.