MMS video file size has a default limit set by your provider. However, basically every phone has RCS available by default these days - which will be used in these cases automatically, within the same messages app - except when Apple refuses to allow it because of cross platform interaction.
You stated that iMessage provided this benefit, and it doesn’t; it isolates this benefit from being used. “Depends on the app” is just false. It’s “depends on the hardware” - google messages even recently expanded RCS support to phones that didn’t support it for one reason or another it in April. These data limitations haven’t been saving people from issues for over a decade, you’re conveying outdated takes.
RCS is already live in the US for iOS 18 Beta users, and will come to all iPhones in 2 months. It’s also an awful spec, you don’t have to dig far to find that. Operators have basically just farmed out implementation of it to Google.
I don’t know why you’re trying to pick a fight. It’s a simple fact. MMS was the standard for years, and iMessage compressed photos & videos less than that. RCS is now coming, flawed as it is.
End of story. It’s just one in a list of many features that made iMessage popular, all implemented years before RCS was a thing. You can move on to complaining about something else on a platform you don’t use and don’t care about.
