I think it's quite reasonable to make that argument. The idea that high growth vs. low growth as an attribute matters more than the "industry" a startup operate

I think it's quite reasonable to make that argument. The idea that high growth vs. low growth as an attribute matters more than the "industry" a startup operates in. So all high growth companies are more like each other, than high and low growth companies operating in the same industry. Therefore startups (i.e. high growth companies) are their own industry. Nassim Taleb makes a similar argument about size. He says that small things and big things of the same type are more different than they are the same. They should be grouped by size rather than by their nature.