Pitch what? You can pitch to anyone you write with. Aside from that, you're pretty much pitching to yourself. Headliners are LONG GONE from anyone's reach. And the people you have to go through usually have a LOT more gold and platinum records than you do, so you don't really qualify.
But hey, you can always go for it. Go ahead and pitch. You also can just walk onto the practice field of a major Pro football team too and start playing. Not really advisable, but you can try it

There is a real world out there. Best to understand the rules before you get on the field.