Sort of. Look up StevenBridges on YouTube, he documents his career as a card counter. It's certainly possible and you can get some profit, but the casino will sooner or later ban you from blackjack, so you also need a steady supply of them.
I just watched one of his videos this morning. Yeah you tend to hit like into the thousands and they tend to see you as a problem, especially on single deck tables. It's not hard for them to spot someone using well known strategies. You can still turn out a modest profit and I think one thing to keep in mind is in places like vegas you might want to find the casinos that aren't owned by the two big companies that own most of them because they share information on punters...
His whole book is like 'why you probably shouldnt learn how to count cards' and its because its a massive pain in the ass and you can probably make more money doing something like poker instead. It's fun from what I hear though every person I know who has the mental math skills to do this has gone to vegas only to get limited at around 1000$ or so. Sometimes they even catch you within like 3-5 hands haha
Fun fact, Ed Thorpe developed blackjack basic strategy and card counting through computer simulation and is pretty much the guy responsible for casinos having to change all their rules at one point with the game. One thing I thought was funny was how steven bridges was trying the fake beard thing, it seemed like the most obvious tell that he was doing some funny business to me, it looked like shit haha
https://graham-kendall.com/blog/claude-shannon-edward-thorp-...
In my 20s I played a lot of poker and did well, but even that is becoming more challenging. And let’s be honest, playing blackjack or poker with optimal winning strategies is a work like grind. Nowadays when I go to the casino it’s craps all the way. Played correctly the odds are nearly even and it’s fun and social. Casino Royale on the strip used to have $2 min 100x odds during the day - those were some fun times!