Many AI projects are just a few prompts away, and very little labor intensive - you are mostly just delegating.
A much more accurate example would be "Why would I pay your son to mow my grass when i can get mine to do it"
If you want it, and you think it's easy to replace, try to reproduce it with AI.
If you find that it is harder than you thought, then go back and pay for the original.
generating an ai image of a potato is a better comparison.
That's the analogous equivalent of spending the tokens to use AI to make this project.
The analogous equivalent of growing a potato yourself over months would be creating this website without AI.
"Just a few prompts" is the new "can do that in a weekend". In reality it still takes a while to build everything, think about what features you want to have and how to prioritize them, how to build a good UX / UI, set up payment providers etc.