Players aren't allowed to drink (or smoke) on stage nowadays. Not like back in the day - that was when darts really was a sport!
This past PDC world championship was live on Peacock in the USA (and as mentioned in the original post - some games were shown delayed on NBC).
Still way more accessible coverage than any recent pool tournaments - Mosconi included.
PDC tournaments are not open. You need to have earned a PDC card to enter. To get one is a grind. Hence the decent money for even losing early on - and about $1,400,000 (million UK pounds) for winning it. Not all pay this much - this one is the biggie.
Luckily for pool in the USA - darts in a bar normally means those pay-to-play soft tip dart 'machines' that kinda discourage the casual from playing. Too confusing (and costly) if you just wanna play 501 like you've been watching on TV.