Hybrid is by definition a gravel bike... At least to my understanding. Not quite a road bike, not quite a mountain bike. Something you can comfortably ride on the road and take it off road, but not optimized for either.

But snarkiness aside, I think I know what you're getting at. You want something more like a road bike that can ride off road, yeah? That's an awesome project and you could have a lot of fun doing it probably.

Since this didn't really seem like a request for opinions or advice, and more you just sharing a cool project, I'll withhold my opinions and advice and your obviously misguided quest to build a redundant bike