I agree, and I agreed with that previous comment and the one before it. But I don't see where the comment I replied to made any reference to the name not doing what it says. I only see him saying that what we call DevOps existed before we called it that.
In any case, of course the name doesn't cause buy-in to happen, just like hiring an "Engineer" doesn't mean the person will do a good job engineering.
You're not saying that we should avoid a term meant to evoke the idea that cooperation is expected, because it might not happen, are you? I can only see rightness in trying to be clear about what's expected and naming roles to suggest positive cooperation is part of the job. If "DevOps" is meant to suggest buy-in and cooperation, you've convinced me that it's a better description than whatever it was called before.