Yeah, I’m a developer, and I’m accustomed to it. There are similar AppleStore Connect toggles to get iPhone apps onto iPad or MacOS. But the problem isn’t how easy it is to enable. It’s the future support.
My product, design, eng and QA teams have been burned by this in the past. Someone clicks the toggle, it shows up on the store, and then we start getting tickets from an all new platform. Internal and external people start finding issues that were not a problem on the other platforms.
Moreover, Apple doesn’t allow take-backs. You can’t easily remove a platform from a universal app. If you want one binary, and you decide that a platform is costing you more than it’s making you, then you’re kind of screwed.
Veteran developers know this, and that’s probably why they held off. I would’ve done the same thing unless there was some sort of back-side business development or marketing deal that depended upon being on the platform.