"just a hobby, won't be big and professional like gnu".
At the start of a project, it can be difficult to know if it will snowball, and since most projects don't, creators often feel like they have to get in ahead of the negativity and set expectations.
Making a browser is a big undertaking, and I would set the same level of ambition. And then I wouldn’t post it on a forum until it has reached a milestone. :-)