As I said, I highly doubt that people will accept Metaverses at this stage.
It's way too early. The infrastructure around a lot of these metaverses are incomplete and game mechanics are too complex to understand properly.
Will you bother to learn so much about a metaverse just to bet $5? Or would you just put $5 on roulette on Roobet...
The same thing was once said about computers, the Internet, and e-commerce. But today these technologies are no surprise, because we use them every day. Metaverse will not be limited to one thing as for example gambling but will give users a wide range of entertainment and leisure. Take a look at how many users congregate in The Sandbox every day and you'll see the future. Rumor has it that Mark Zuckerberg is developing his own metaverse. I don't think he's going to invest his money in unpromising projects.
You're right, both in terms of the Metaverse program and with the current mix of NFT, Games and hype that is hard to categorize individually. As long as the Metaverse has its market they can trade and take profit means they are operating in the market they should be. Play to Earn is indeed in the spotlight to include many types of gambling, but so far it still doesn't really show how the two have a fairly transparent relationship.