I actually feel pretty differently on this. Personally, to me, a sex worker is a prostitue. The term "sex worker" was coined specifically to give more legitimacy and to emphasize the "work" aspect of prostitution, and to give a less stigmatized name to it.
Now, when we use sex worker to describe everyone from full service girls to phone sex operators, I think it gets confusing and has taken the term away from the people whoade it specifically for the purpose of having a name for themselves. So if sex worker is now an umbrella term, we're back at square one because now there's no specific term for prostitute other than maybe escort, which isn't applicable to everyone.
And personally while I like solidarity, I think it creates false equivalency. For example in Canada there have been changes to our laws surrounding sex work (as in prostitution), about what will be legal and what isnt. The press have been overall quite good as referring to this as sex work, but if we lump everything together, that doesn't make sense or (in my opinion) put enough focus on the specific ways that full service workers are harmed by the legal system. To me, a phone sex operator who works a legal job where she has no immediate risk of danger from clients doesn't have enough in common with someone who may be arrested for their work and is routinely at risk for violence to lump them together.
So personally, I think of all of us (strippers, camgirls, PSOs, escorts, etc) as wing on the adult industry or in the sex industry, but I don't consider myself a sex worker because of camming.
But that's just my thoughts and I can definitely understand where everyone's coming from. There are certainly a lot of similarities between all the jobs (stigma, safety risks, etc), I just think the differences are lost in an umbrella term and that those differences are really important.