On the one hand I understand that conveying this as an average temperature difference makes the value more understandable, but it also makes some people miss th

On the one hand I understand that conveying this as an average temperature difference makes the value more understandable, but it also makes some people miss the point that this is mostly about heat capture. And that this energy increase in will be noticed in many different ways. Moreover the process amplifies itself (eg. when some part of glacier melts, this area no longer reflects sunlight back into atmosphere, but the dark water absorbs most of this, which leads to even faster heat absorption).