Spoiler: it’s not because they are getting unemployment checks.
Working as a server or bartender is hard work. Like retail work, you have to smile while putting up with rude or demanding customers. Back when I was a bartender, one irate customer spat his false teeth at me.
Also like retail workers, you aren’t paid well. In fact, in most states you’re paid far less than minimum wage. Servers rely on tips to make up the difference.
Here’s a “friend link” to the rest of the story