Yeah, I wonder about this, too. Some Ts do seem to really vilify Fs, and it seems unreasonable to me.
I'm very much a T. When I do get hit with emotions on occasion, especially if they're negative, I often don't know what they mean, or where they came from. And I have a difficult time arranging them in my mind and making sense out of them. I don't have any meaningful handles to attach to them. Later, when I'm no longer feeling them, I can't for the life of me remember what my process was in dealing with them, how I came to the conclusion that I did, or sometimes even what conclusion I came to. It's all evaporated. Basically, I'm an incompetent boob at processing that kind of stuff.
Personally, I admire Fs and their adeptness at processing this stuff. I wish I had more of their skillz. Of course, there are some immature, impulsive, irresponsible Fs, just like there are a some immature, impulsive, irresponsible Ts.
It's been my experience that most of the time when someone vilifies another type, whether it's a specific type, or all SJs, or whatever, it's because they've had a bad experience with one or two individuals of that type (a coworker they can't stand, a relationship with an ex that went badly, etc.). They then myopically project the specific, personal character traits of that one person onto their entire type class. I suspect this may be behind some Thinkers' antipathy toward Feelers. The neighbor's German Shepherd bit me, so German Shepherds can't be trusted. Or even, dogs can't be trusted.