Do you expect people to think of skilled artisans working on handmade goods when they hear mass production? Because upon reading Wikipedia [1] or a dictionary [2], I'd think of factories, assembly lines, machinery and automation.
Etsy is a site that advertises carefully crafted handmade goods from independent creators, that are often custom and unique. They were looking for non-mass-produced handmade goods and found mass-produced goods from China instead. That's a mundane factual observation that couldn't be made clearer.
You're not really making your case here. Reading your flagged comments is not as flattering as you seem to believe.
[1] https://en.wikipedia.org/wiki/Mass_production [2] https://dictionary.cambridge.org/dictionary/english/mass-pro...