I think that whenever there's a criticism of Socionics, there is always a conscious or unconscious attempt by someone to underplay it or soften the blow, by saying "It's not so bad", "Sure it has its flaws, but there is some good as well", "Just don't think about it too much", etc. Of course, this kind of phenomenon is not necessarily limited to Socionics, but you often see it in other similar dubious practices. There is sort of this automatic reaction to attempt to justify it. But in the end, it's just a way to side-step the issue and prolong its inevitable decline.
Ironically, that's what makes it even more cult-like.
My guess is that these people don't necessarily want to "defend" these things like they normally do, but they're "speaking for" the people that might get seriously mad from the criticisms of any theories or persons or countries or whatever. So they want to soften the blow.