I find it curious that your reaction to this is to reduce OP's point to the "capitalism is bad" trope when it is in fact more nuanced than that. His point isn't anti-capitalist per se - it critiques the traits of the dominant economic system that many of us currently live in.

I won't assume bad faith on your part, but your argument also relies on a big assumption with regards to productivity gains, and who reaps them, and at the detriment of whom and what.