By that logic, Uber and Instagram and WhatsApp should not have been started, as the iOS App Store is unequivocally "someone else's land", and these services could only exist as native apps.
In the early days if something had gone wrong, it might have been a different story.
Though I suspect that companies with good VC connections might have side channels into Apple or Google to clear up problems.
Not like little guys who can wake up one morning to discover their $20K/month business is no more.
Not at all: one could see a future where any of those companies become Uber rivals - they're both researching autonomous vehicles. When that comes, one incident at Uber and its reason enough to expel them.
Also, if it helps, by that logic no one shouldn't be using iOS or anything by Apple, which is also a rule that I follow.
This is a relatively recent development. I'm fairly convinced it didn't happen sooner in an anticompetitive move to promote native apps over the open web. (Same with web push notifications and a million other tiny things.)
Instagram did not and could not have had a webapp in those days (which is a majority of the time Instagram has existed).
Ironically, given your conspiracy theory, it was Meta that broke Instagram for the web.
You can build on someone’s land, but you’d be wise to be ready to move as soon as it becomes necessary. Essentially you are a nomad, reconfiguring your business to changing conditions, accepting that things will change over time.
Splitting yourself between platforms is exactly how you risk mitigate this kind of thing.