Well there is, just not free-to-air. The whole lot is on Sky Sports F1 (a channel I have as a legacy from Sky HD days, I don’t pay extra for it and probably wouldn’t).
If I paid for subscription sports channels, I'd never get anything done...
OTOH, a lot of them aren't worth the money, and you can usually find a free stream on the Tube of You for a lot of motor racing anyway.
I grew up without a TV - didn't get one till my 13th birthday - and so turning the radio on to listen to a commentary is a kind of nostalgic habit for me anyway.
Simon Taylor was "the voice of motorsport" for me back then, and not Murray Walker.