I'm confused by this, but also curious what we mean by "fastest".

In my experience, the bottleneck has always been backend dev and testing.

I was hoping "tooling" meant faster testing, not yet another layer of frontend dev. Frontend dev is pretty fast even when done completely by hand for the last decade or so. I have and have also seen others livecode on 15 minute calls with stakeholders or QA to mock some UI or debug. I've seen people deliver the final results from that meeting just a couple of hours later. I say this as in, that's what's going to prod minus some very specific edge case bugs that might even get argued away and never fixed.

Not trying to be defensive of pure human coding skills, but sometimes I wonder if we've rolled back expectations in the past few years. All this recent stuff seems even more complicated and more error prone, and frontend is already those things.