The UK experience has shown how sports betting is popular as something spontaneous that fits into life, watching the game, etc. Mobile scratches that itch. For that matter, Sinclair broadcasting is interested in the ATSC 3 standard because it lets you transfer a web "player" to a TV set that could support sports betting through the remote control:
https://www.tvrev.com/news/broadcasting-atsc-3-gambling-nab-...
For many people sports betting is good clean fun that helps people get more fun out of the game, but for other people it is a dangerous behavioral addiction.
The thing about addiction is that addicts really need to get away from temptation to come clean. It is easy to keep away from the casino but with gambling in your pocket, advertised at the ballpark, advertised on the broadcast and even embedded in the broadcast, it's going to be very hard for people... A person with a gambling problem may have to stop watching sports entirely, which is a shame.