[dang]

From my perspective this line of thinking makes more sense for in-person contact, where it's possible to read the other person's state more accurately and get a feel for whether or not one's helpful suggestions are actually helpful or not. What matters is not the message you send, but the message the other person receives, and a lot can change from one to the other.

Here on an internet forum, we have almost no information about each other. The risk of such comments doing more harm than good is much higher, partly because the potential for misunderstanding is so high, and also because people have often used this language in snarky ways, for personal attacks, and so on.

That doesn't mean you can't reach out to someone you're genuinely concerned for, but the burden in that case is on you to disambiguate your intention from anything presumptuous or malicious, and that requires a different communication style—much less generic and casual.