I've said a lot of negative stuff in the past about the Wall Street banks, and I have come to regret most of it after learning a lot more about finance. Stocks absolutely can be a way for the "rich to get richer and the poor to get poorer", and of course the traditional exchanges aren't a vaccine against that, but I do think that they do some level of vetting to make sure that companies aren't just Ponzi schemes.
I mean, for example, WeWork had its IPO rejected in 2019 because regulators were afraid about its business model, and it only ever went public through a SPAC loophole. Clearly they shouldn't have gone public at all, but some basic sanity checking is better than zero.
To be clear, I'm totally onboard with Texas making their own exchange if they can actually do it better, or at least as-well. Competition is a good thing.
Ironically, the more I learned about finance, the more I disparage it. I worked (actually) on Wall Street back when it wasn't a strip mall. It's just a casino for the vast majority of people that call themselves investors.
I do think that option contracts might be evil and a glorified casino though. It feels like they kind of end up with a means of really really rich people to extract money out of poorer people without those people actually gaining anything back; since options are (as far as I'm aware) a binary "make money or lose your entire investment" situation, and each transaction requires a winner and a loser, it definitely is very analogous to a casino.
I do call myself an "investor", but 95% of all the money I have in the market is in low-risk ETFs (VOO and VTI), which I don't think is gambling.
[1] Well, they might still be evil but I think it's a necessary evil in order to put downward pressure on the market to avoid ponzinomics.