Where is the proof that Javascript is a better language than Typescript? How do you know if you should be writing in Java/Python/C#/Rust/etc? Probably should wait to create your startup lest you fall into a psychological trap. That is the ultimate conclusion of this article.
It's ok to learn and experiment with things, and to build up your own understanding of the world based on your lived experiences. You need to be open minded and reevaluate your positions as more formalized understandings become available, but to say it's too dangerous to use AI because science hasn't tested anything is absurd.