That's different from the issue of Beeper stealing Apple services, and I've already made comments in one of the other threads to the effect of Apple and iMessages being nowhere near a monopolistic practice due to the availability of many other messaging options.
And how many of those messaging services are used on half of the phones in The US? If there wasn't a proble, Beeper Mini literally wouldn't exist.
You don't understand how monopolistic practices work then. Having other options is the carrot big tech gives to claim they're not a monopoly.
Remember Internet Explorer in the 90s? There was still Netscape but Microsoft all but killed the company. Remember AirTag? There is still Tile but Apple is doing a good job killing the business.
Being a monoply does not mean there are zero other alternatives.
Besides tell this to the US and EU governments, you know ones with all the data in front of them
.