Earlier quoted context omitted.
That is a very heavily commented ticket (600+ comments) so it’s hard to assess all the alternative positions. However, in my view: as one of the four stewards of WHATWG, Apple have an obligation to either implement the standard, or propose a convincing alternative that the steering group can adopt. I don’t know what’s more embarrassing; that Apple tried to use market power to modify a standard after failing to do so…
They presented a clear case of why they refuse to implement them. That's how how standards work
If Apple do not wish to implement the standard, they should leave the steering group.