I was the president of a ttrpg university club 2018-2019 (which is 8-7 years ago YIKES) and was very focused on getting more diverse players into the hobby, so this topic is so interesting to me. The experience you describe was not my experience when I got into the hobby about 10 years ago, but I haven't interacted with new players for the last 6 or so years. Most of the people I play with now are people I met at the ttrpg club in college, or their only exposure is through me (because I dragged them to my game lol). Your opinion makes sense given how much more polished and popular mainstream liveplay ttrpg shows have become.
I apologize in advance for the long paragraphs below detailing my personal experience. I want to explain how liveplay shows looked 10 years ago and the impact they had on me.
I started watching some of the liveplay shows on the Geek and Sundry youtube channel circa 2015 like early Critical Role. Some weren't liveplay, but edited, such as Titansgrave and The Adventure Zone. They did have professional actors with improv training and production teams behind them, but they weren't nearly as polished or as much of a phenomenon as they are now.
At the start, Critical Role appears to have been filmed in one of the Geek and Sundry meeting rooms. They had 4 static cameras. They usually had 1 on the DM, 1 on each side of the table, which appears to be a pretty similar to what it looks like now.
Occasionally they would switch to the 1 focused table when looking at maps. The maps looked like this in episode 1:
There would be frequent bouts where they would pull out the sourcebooks and look for a rule, and discuss interpretations of it. I feel like they would go on random tangents sometimes, but these might have been in-character jokes, I don't remember super well.
For me, these shows were a great intro into the hobby. They provided a way to see people play and see them use the rules live. After a couple of hours of watching I thought "hey, I get it. I could try that". I wasn't as afraid of trying them out anymore.
It was also nice to see that the games weren't just focused on combat and finding loot. It was inspiring to see them so character focused and the players so friendly with each other.
Another factor is that ttrpgs at the time had a reputation for being overwhelmingly for white cis straight men. Media representation solidified this: If there was a girl at the table, there was only one, and she was typically sexually harassed or treated way differently than anyone else. This reputation really prevented me from getting into the hobby. I was afraid of sticking out. I was afraid of the men treating me strangely for being there, either negatively or positively. I was nervous about being talked down to as the rules were explained. I was afraid that if I messed something up, they would accuse all girls of being bad at ttrpgs. Liveplay shows not only let me learn the rules and social expectations to feel more comfortable, but they let me see women in these games, and they were interacting with men who treated them respectfully. It is so much easier to do something after you see someone like you do it.
When I first joined my college's ttrpg club in 2016, the club was overwhelmingly cis straight white men. I did experience some amounts of weird treatment that made me a little uncomfortable, but knowing that people like me did belong helped me power through it. Within the next couple of years, the diversity of the club greatly increased. There were a lot more women and queer folks (a few more non-white folks, but not as diverse in that regard as I would have liked). Although I'd like to take complete credit for this change as the president of the club, I feel like that change in part because of liveplay shows and other ttrpg media.
I did not experience anyone expecting the game to be like these liveplay shows. I think most people at the time had a good understanding of what a normal game might look like: shorter games, no minis, regular people with ok improv skills, just a buncha friends screwing around.
Again, this was 10 years ago, things are different today. I'm not a new player anymore and don't interact with new players. I'm curious for those of you who feel like the liveplay shows fucked your expectations, what your specific experiences have been like? I would love to compare and contrast now vs 10 years ago.