Sponsorblock does allow you to whitelist specific channels. Should be in the settings somewhere, I've only ever done it via the ReVanced app but it should still be an option on desktop.
Some of it is per channel settings (some channels have way too long of sponsor segments), and some of it is just disagreement about how granular to be (on LTT they cut out the entire segue to the sponsor, and not just the sponsor spot, i dont want the LTT sponsors, but not being serious is their whole thing, I don't mind watching the segues)