Oh man. Since I first started getting into tequila about a year ago, I've read a shitload about the additive free thing, and I've definitely got some thoughts.
The short answer for me is "yes". For me personally, I want to try everything, but there's just so much out there that that's just not possible. So I do tend to buy AF, almost exclusively in fact. My theory is that it's both a decent indicator of producers that are putting a little more care into their product and using more traditional methods, as well as tending to be smaller producers rather than global behemoths. Those are blanket statements that aren't always true, of course, but the bottom line is that I have to start somewhere.
That being said, I find the AF "movement" to be very dogmatic, occasionally to the point of being offputting. I'm talking mostly about the tequila subreddit, which is the only other place that I read/post about tequila. There are quite a few people there (not all, but probably a majority) that subscribe to the belief that additive free necessarily equals good stuff and anything with additives is trash, not worthy of the drain. I have two big problems with that. Number 1, it stifles discussion. That subreddit is boring as fuck, because it's the same 10 blancos being recommended and talked about over and over again. They may as well post a list at the top that says "buy El Tesoro, G4, Ocho, Cascahuin, etc" and shut it down. Novices that come along and say they like Casamigos or whatever get shit on. Questioning the status quo of discussion there gets you shouted down immediately.
The even bigger problem I have is that I strongly, strongly suspect that "AF = good, additives = trash" isn't even true. I would bet that there are plenty of tequilas out there that are carefully made by thoughtful people using traditional methods who also happen to use some additives to achieve a certain flavor profile or provide consistency across batches and years. I don't see what's wrong with that, honestly. They're not breaking any rules, it's all right there in the regulations. There are probably also plenty of tequilas on the market that don't use additives, or use them sparingly or only occasionally, that aren't "certified" AF. Just off the top of my head I can think of a handful of reasons why a producer might not be interested in participating.