I was addressing the problem with ideas that people should "just stop doing things", or that we should be drastically reducing consumption, or halting economic growth. These things, "consumption" and "growth", aren't just luxury goods and high valuations of bullshit companies. It's peace and prosperity and a hot meal on the table. It's scientific progress and all the technologies needed to fix the mess we've made.
Since bring up blaming: sure, "an average US consumer could easily forego half of what they buy (aside from groceries) and they'd still be fine". But good luck making them do that. When dealing with climate change, we need to talk about what's possible, not about what would be possible if we were living in a fairy land where every human is a perfectly rational actor prioritizing good of the many over the good of the few, and coordination problems didn't exist.
So no, not "stop doing things", but not buying shit you don't really need would be a good start.
There is an often unmentioned extra constraint on dealing with climate change: we have to do it in a way that doesn't break technological civilization.