If you order a pizza from an app, and assume you can pick ingredients from a checklist, would you consider it "making" a pizza? Would people get the feeling of accomplishment?
The very concept of "reverse centaur" implies a balance towards the "order pizza online" side of the equation.
Now generalize this. Every tiny community, every person with a disability, everybody for whom the default software doesn't work right? Can now change it specifically for them. Not add peperoni, that's far too low-dimensional to capture what is happening. Actually build their own interface, be able to use something they simply didn't have access to before, and critically not depend on another programmer (there are like a dozen of us blind ones!) to build something for them.
You can feel happy about the result, you can find the house useful, but you shouldn't feel a sense of building accomplishment, because you didn't build anything.
With AI & apps there's less friction, because you don't even have to hire another human being, it's just prompting. In that sense, it's definitely closer to ordering food from an app.
In any case, in the context of TFA, there's also a sense of low quality, cheaply made. The bots making the PRs aren't reading the contribution guidelines, so that's low quality all by itself. Drowning a human reviewer with a mass of PR is also a low quality way of contributing.