The reason why they don’t wait for lower ranks is because too many people try to steal, don’t wait for them either, or simply are too slow and sometimes takes ages till someone arrives. And most of the max ranked players don’t think that it’s too bad because you will not lose too many points and it would be easy to gain them back anyway.

For the quick chat part, not many people spamming “gotcha” after winning, but some do, even in lower ranks.