That's fine. The second point was precisely that if the company doesn't want to provide an API, fine; but they then don't get to try and stop people from scraping it instead. And I agree with my sibling comment; Woocommerce or Shopify or whatever just build it in like everything else they provide.
Agree re: scraping, I was more stuck on "obligatory" so I guess I glossed over that.
I also agree that the big players would roll it into their core offering which would make life easier, but I'm wary of monocultures. A lot of people are already a bit annoyed at how much Wordpress is out there and this would just be another reason to skip a smaller (or bespoke) alternative and raise the barrier of entry for anyone thinking of making an alternative. But if we're agreeing that no one is forced to do it and scraping is OK, that's fine.
