"The rest of the industry" - when apple creates actual standards, the rest of the industry follows.
Linux uses CUPS, even Chromecast uses mDNS, and KDE famously invented WebKit (and still uses it).
It's not these standards people complain about, it's the custom, walled-garden, proprietary stuff.
Like Lightning, which could have been a global standard, if it didn't encrypt all transfers with custom chips, a custom handshake and custom protocol, all of which only apple controls.