Definitely. If s/he was some mainstrain-lang developer with no niche skills, what sppecific job requests would you filter by? You have nothing of specificity, and the job posters see hundreds of people identical to you.

With that said, i do think there's something to be learned from this post and in general the OP. I don't mean to be dismissive to them entirely. Just the idea that this filter approach is general advice seems to be incorrect to me; I imagine your success with that workflow will be proportional to how unique you are in your skillsets.