Never entirely seen that argument, and there are many who don't agree with it, bearing in mind that there have been a number of similar periods of relatively little change throughout the record, and long before we were about. There are also significant blips in both directions even during this period, which there surely ought not to be if we were responsible for some kind of dampening effect. Seems to me that you can pick out any number of similar periods, and some much longer, where you will see the same thing. So I am not convinced that, as far as the Holocene period is concerned, it is any more than a coincidence. I agree entirely with you about it's end, and our contribution to the next phase.There is an argument that we are also responsible for the unusual relatively steady state of the recent holocene 10000 years which roughly coincides with the development of agriculture. Now ended as we arrive at the "anthropocene" and rapid change.
https://ucmp.berkeley.edu/quaternar...eatly influenced the,as our species is doing.https://education.nationalgeographic.org/resource/anthropocene/