That the reasoning is fallacious doesn't make the conclusion incorrect. I could argue that 1+1=2 because when I looked directly into the sun today both my eyes closed. The reasoning is wrong, but the conclusion is true.

Similarly here, you could argue that the popularity argument is stronger because the tools are relatively easy to switch between and people are constantly re-evaluating this choice as new projects are created. Lock in and other switching costs bolster the concern of relying on popularity, but those don't come into play very strongly here.