You're right about that. People who try to fix others do so because they don't want to feel the other person's pain because, it hurts, it's unpleasant and they don't know what to say. They genuinely want the other person to get better but fail to see how it may make them feel worse by suggesting a fix.

To me, someone saying "wow that sucks" tells me this person doesn't bother to think about what I said and is barely spending brain space on listening to me, instead choosing to blurt out a generic platitude. Their response lack a proof of work. Whereas if someone answers with something that clearly demonstrates that they feel engaged in my struggle, enough to spend some brain power on it to form a useful opinion or come up with some ideas, that's much better.

It’s all in the delivery. You can say it in a way the sounds dismissive or compassionate, that’s on you.