There are a lot of steps in the chain between what we have now and the end state you're afraid of, and none of them are certain. Maybe students don't believe they can make a fat salary working on blockchain technology. Maybe they're not successful convincing schools to offer courses in blockchain tech. Maybe Facebook researchers don't get hired by universities, and maybe academic research into blockchain tech doesn't take off in a big way. Maybe the NSF doesn't see the need to start funding blockchain research.

I can't tell the future, but given the current trajectory (like the recent big crash) I see at least a decent probability that web3 goes absolutely nowhere.