Casinos, when done right, can be just as good as any other member of the entertainment/service industry. They've also gotten much better at their craft in the last decade in terms of financial security, resource protection (aka loss prevention), and being more akin to hotel resorts with slot machines rather than dirty, junky rooms full of smoke and one-armed bandits.
As far as the games being rigged goes...people know that while they could win the jackpot, the odds are stacked against them, and they will likely lose whatever money goes into the machines, or on the table. It becomes a form of paying for entertainment, just like going to a movie, show, theme park, sports event, or any other form of entertainment. They pay for the fun of playing the game knowing full well that the money will be gone, just like it's gone when the movie credits roll. The ones who don't are not gambling responsibly - something every legitimate casino highly encourages.
Given these things, and all else that comes with modern casinos, I really don't see a problem with legalized gambling. I have several friends who work in LA casinos, and they're happy to be employed. They aren't dealers, though there's nothing wrong with being a dealer. The "sex worker" remark is ludicrious. Where's the protests outside every Hooters in America about risque uniforms?
Manufacturing and tech jobs are great, but other people need jobs too. The vast majority of casino jobs are not unskilled jobs, and are every bit a legitimate means of earning a living as any other.
"If [Republicans] were around when Columbus set sail, they must have been founding members of the Flat Earth Society." -- Pres. Barack Obama