No good answer for this situation, but at least your post is thoughtful and respectful. Too much personal attack for concerned opinion here lately.
Over time we seem to have taken the concept of “mission creep” to a whole new level. I think most Americans are weary of endless military engagements with nebulous objectives.
That said, I suppose an argument could be made for keeping a small force there but the problem, as always, is what starts out small is likely to expand in unanticipated ways.
You’re right, there’s no good answer. In any decision there are always pro’s and con’s. The object is to try to maximize the pro’s but be prepared to deal with changing circumstances. Then again, some problems are intractable. Those are the ones you don’t want to get stuck in.