TFL = guys who can't get girls and blame their unhappiness in life on not being able to get girls.
MGTOW = guys who legitimately just don't give a f***. They are not waiting until they meet a woman to be happy. And yeah, most of them are probably not alpha. If they were, they would be partaking of the bounty that is available to alphas in this day and age.
Most of these guys are older, in 30s, 40s or beyond. These guys have basically been there and done that, got the alimony/child support t-shirt and just basically decided that it's not worth it to them. As far as I know, some of them will still have casual sex, just not put a lot of effort into it and not get into committed relationships.
I agree that MGTOW is too extreme, for what I want to do at least. But I lean more that way than guys like Roissy and Roosh V, who seem to have captured the zeitgeist of the seduction community in the present decade. I think those guys go too far with their approaches (giving girls attention that they didn't earn) and tolerating *****y attitudes from women. At the same time, I understand why they do it. They get enough women that it really doesn't matter if one girl is a ***** to them.
I just happen to be one of those people that tends to think of the greater good, rather than just the individual good. PUA's doing mass approaches may help the individual PUA, but it drives up the price of poon. Conversely, in the more universal sense, what the MGTOW's are trying to do would be beneficial for just about all men. Either it would reduce competition (because of them dropping out) or, if enough guys changed their standards of what they would tolerate from women, then women would cease to be reinforced for bad behavior.
Of course that will never happen on its own, because men don't have a brotherhood, the way that women have a sisterhood. We see on this board itself how guys are constantly willing to undermine each other, whereas women tend to band together more. There's always a guy who will sell his bro down the river so he can get a little piece of *****. And I don't see that changing any time soon. What may happen though, is that this type of movement may develop out of sheer cost/benefit analysis of pursuing women. It will just become not worth it for some guys. And then movements like this will develop to direct that energy.
I see it as having the potential to be a sort of sexual labor union for men, similar to the way that feminism has renegotiated the terms of courtship for women.