Why is it SO hard to score sponsorships?

I'll reach out to 50+ big creators, and never even get a response email. Nothing. But when I reach out to a small youtuber, 20 percent of them respond. And most of the time they stop responding after the pitch, but some stick of course.and come through.

I dont know how to reach out to big creators other than email because half the damn time their signed onto BS agencies that handle all their emails. Mine never seem to make it past the 3rd party.

Start small and gain authority, obviously big youtubers and their agencies have bigger and more profitable clients to pay atention and get involve with.