!!!!! Midoriya doesn’t fully understand how famous he is. He approaches everyone in the hero industry like they’re equals (or like he’s the fan). He has no idea these small-time heroes are having an existential crisis just because he’s breathing the same air as them, let alone asking for their autograph.
He routinely murders rookie heroes by bouncing over to them and babbling about how he’s a fan of their work, and he thinks their quirk is just so cool, and he really likes their costume. He still takes notes about other heroes, so when he meets other heroes (no matter how small-time or underground they might be) he pulls out these journals that contain actual notes about them, sometimes with sketches, usually with a tiny brainstorm on strategies/other uses for their quirks, and shares his advice with them. He’s made grown heroes cry. His smile is too bright. Too earnest. RIP every baby hero he comes across
Because Midoriya never stopped seeing himself as a fan. Because he never sees anyone else as below him, never thinks he’s above anyone else, even as the rising Symbol of Peace. It’s a part of his charisma, and probably just earns him even more fans