You think state or even corporate espionage is less lucrative than someone blackmailing you because you were satisfying yourself?

Corporate espionage is potentially more lucrative yes but the opportunities are much less. There are millions of MacBooks out there with significantly more people jacking off in front of them than discussing lucrative corporate secrets

For corporate espionage it is most certainly company meetings which are of interest.

I'm not sure real "jerking face" blackmail is that frequent. If caught the author would face heavy charges. It's probably way easier and less risky to massively scam by pretending you had access to the webcam than to actually bother to hack.

Beside I'm not sure a "jerking face" would be more than awkward if published. A reverse angle in which you could identify what was the video used for the jerking session would be way more compromising.

And in this regard poorly protected IOT surveillance cameras have way more evil potential that webcam in my opinion.