That's going to depend on your definition of influencer. I do believe some online coaches with YT content can provide value to viewers. It might be extremely limited compared to an in-person lesson, but if you can't afford lessons then YT videos are probably better than nothing.
Does J Smith at AskGolfNut count? I think some people can find value in his content. His information might not lower your HC but it might save you time and money when making equipment decisions.