Personally speaking, I've never cared whether someone "validates" my emotions (and I often view such attempts as a bit patronizing or insincere). There's a problem to be solved, so let's attempt to solve it or at least compromise in good faith. The resolution to the problem is the most likely way to elicit positive emotions from me anyway.
It is so refreshing for me to read this because that's how I feel a lot of the time. I actually don't want someone to say "I understand where you're coming from", if they don't. That happens often in professional life and nearly always feels insincere. I'd much rather someone asked for clarification or for me to expand on what I've already said so that they can actually understand my viewpoint so that they can consider if properly before pushing through their "better" idea.