What a sponsor is actually buying
When a company puts money behind a driver, that money comes out of a marketing budget, and it sits alongside every other option that budget could have funded. It is competing with paid social, with events, with influencer campaigns, with trade advertising. The person approving it has to justify the spend against those alternatives.
That means the question in the room is never whether your driver deserves it. The question is how many of the right people will see this, how often, in what context, and what that costs per impression compared to the alternatives.
Framed that way, a sponsorship request with no audience attached is asking a marketing department to make a charitable donation out of a performance budget. It gets declined for the same reason every time, and the driver usually reads the decline as a comment on their racing.