Progaming via blueprint and generated code

Hi. I’m new to forum. So if I posted in wrong section please be polite on me :wink:

I’m more artistic guy than programmer :wink: but I wonder if it’s possible to made game entirely with blueprints instead of c++? I work alone, but if I have to I’ll see forward to make collab with c++ programmer.
Last question: If I make game only with blueprints, will it generate too much trash code? Which affect on performance, smooth gamplay etc.?

This guy built his game with zero c++ and released it on PS4, and it even has online multiplayer, so it seems to be possible.