First of all, they're not locked by the developers, they're locked by me, a volunteer admin. I don't work for DC nor is it them choosing to lock those threads.
I'm enforcing a very basic level of requirement for feedback threads which are easily identified by reading the Post Guidelines as not being present in those threads that are locked.
There's no "coldness" or "animosity" from enforcing a basic level of conduct in the forums.
As per the Post Guidelines:
"This Forum is here to enable the developers to gain important feedback, suggestions and more to help guide the shape of the game.
As a result, **we expect certain conduct that differs greatly from how we would expect people to act outside of this Forum. **"
If you are not willing to put in a base level of effort to properly participate in giving actual feedback, then you should not post inside the forum.