I still don't see your point.

Your argument was they had a rule of "one standard and two proprietary ports" as a means to "allow data to be ingested easily and freely shared inside Apple ecosystem, but not exported back out to the outside world with same ease".

For serial they used mini-DIN to save space on the back of the machine instead of a random mix of DB-25 and DE-9 on the PC side. My family and everyone I knew used a dime-a-dozen cable to use a typical PC modem, data was shared feely. There was no "one standard" port at this time to get data "ingested", serial went both ways.

Even on PCs, to do anything serial you needed hardware and driver support anyway, that was the blocker, not the shape of the port. If Apple adopted DB-26 for serial, how would that let data share more freely?

For SCSI, the DB-25 Apple used was not proprietary. And even in the System 6 days they had Apple File Exchange to access FAT-formatted disks to write data out for PC users.

For Ethernet, Apple started building in Ethernet as standard before PC makers. They sold a laptop with Ethernet built-in in 1994, this was unheard of on PC laptops.

As for AppleTalk, they pushed LocalTalk at a time before PCs had any built-in networking whatsoever, a PC network card cost a hundred bux and were only used by corporations whereas in the home if you had a Mac you could make a network with a printer cable between two machines, Apple got it for cheap by spending an extra 10 bucks on RS-422 for their serial ports, why wouldn't you advertise that?

If you're talking about AppleTalk the network protocol rather than LocalTalk the physical protocol, Apple bundled TCP/IP with MacOS before Windows did ("Trumpet WinSock" was third party software), back when Microsoft thought they could stop people from adopting the internet since "The Microsoft Network" was so going to be so much better.

Arguing that adopting the Apple making PowerPC machines adopting the Intel-defined USB which was already on PCs for years before was a means to keep people from moving data out from the "internet Mac" (which was advertised as letting you share information with the world with "there is no step 3") is just... it makes no sense.

iOS on the other hand... Completely different thing.