I agree that this is a valid concern, but I don't think your evaluation of the situation is entirely fair. Namely, I almost never open any controversial and inflammatory topics on this forum. (And I definitely haven't done so in a very long time, nor do I intend to do it in the future.) I make comments on such topics only when I see that others have already opened them and I believe that what has been written is seriously flawed. (In fact, usually I don't react even then.)

Therefore, while I certainly accept that my incomplete arguments may cause the problems you describe, you must take into account that the alternative is a situation where other people's arguments stand unchallenged even though they are, in my opinion, seriously flawed. In such situations, leaving them unanswered would create a problem similar to the one you point out with regards to my comments, i.e. a misleading impression that there is a more agreement with them that there actually is. (This even aside from the problem that, if I am correct, it would mean wrong arguments standing unchallenged.)

In these situations, I take my arguments as far as I believe I can take them without causing so much controversy that the discourse breaks down. This is a sort of situation where there is no good outcome, and I believe that often the least bad option is to make it known that there is some disagreement and voice it as far as it can be done. (In the sense that this outcome, whatever its problems, still makes the best out of the unfavorable trade-offs that unavoidably appear whenever some controversial and inflammatory topic is opened.)

Of course, there are many ways in which I could be wrong. Maybe the arguments I see as flawed are in fact usually correct and I'm just creating confusion and misleading people by parading my mistaken contrary beliefs this way. Maybe these topics are so unimportant that it's always better to ignore them than to raise any amount of fuss. Maybe my comments, however careful and diplomatic I try to make them, still serve as a catalyst for too much bad discourse by other posters. Relevant to your comment, maybe the confusion and misleading impressions left by my comments end up worse than the alternative outcome in case I stay silent. I recognize all these possibilities, but nevertheless, I think the concrete objection from your comment fails to recognize the relevant concerns I outlined above.