I honestly get it. Apple has been excruciatingly stubborn to adopt RCS.
I think in the past this was excusable because RCS has been such a moving target. First it was the carriers disagreeing about how to implement, and dragging their feet, then Google got tired of waiting for carriers and sort of bypassed them. But even then RCS is messy when it’s part carrier, part Google, etc. Even Google Fi doesn’t support RCS if you want its text-from-computer function working! Then came e2e encryption, which has been haphazard.
At this point though, it is starting to solidify. Apple should implement it, and if Apple drags their feet, regulators should intervene. Don’t rule out that happening in the EU, either.