perhaps (as it seemed to me) there wasn't a way of making my point clearly and correctly without too much wall-o'-text

In such situations I usually choose to not say anything and let it go.

When both of your options lose, the only way to win is not to play :-)

Result: some combination of boring defensive writing, and reduced participation (hence, less interesting stuff on LW).

Since we've been talking about trade-offs, let me point out that there is one here, too. Let's imagine a wonderful world where people like me are absent and everyone is very nice, highly supportive and full of praise. Gold stars for everyone! What kind of writing would you expect to get?

My cynical side says that you will get a whole lot of badly written, unfocused, lazy, vague, incoherent crap. You might well get increased participation because yay praise and hugs for little effort, but thoughtful people would leave, for obvious reasons. That doesn't look like a good outcome.

As usual, balance is important. You want to prune (and disincentivise) crap and you want to promote (and incentivise) interesting, insightful writing. The exact location of the proper balancing point is, of course, debatable :-)

One more thing -- it might be helpful to think of LW as an ecosystem. An ecosystem likes and need diversity. That, in turn, implies that LW needs different kinds of people who will fill different roles. Some people (like me) will snap and bite. Some people will nurture and grow. Some people will dump the minutiae of their daily lives onto LW. Some people will think for a year and then make a single post. Some people are interested in neural nets, some are interested in ponies, some are interested in how to lose weight and pick up girls, and some are interested in how to make sure LW doesn't become an example of Lotka-Volterra equations.

Monocultures are bad, mmkay?