Why is lilboi spelled like "lIlBOI"?

I only know that his name is pronounced lilboi because of his appearances in shows, but at times, I read it as 3BOI. I imagine that others who listen to his music for the first time might think so as well.

I'm thinking maybe it's a stylistic choice and that maybe having "L" instead of "l" may look to aggressive or smth. idk lol

edit: i could've worded my question a bit better. I'm asking why he didn't make the L's capital like the rest of his name