Do they send worse images than an Android would send over MMS? Because even on Android I wouldn’t send pictures over MMS because they’ll be scaled down.
Neither is great but Android MMS is much better. And of course RCS is better still. And Google Messages let's you automatically upload videos to Google Photos and let you share them with a link. The affordances to send high quality video are significantly better on Android.
(I don't use any of the above, instead preferring to use Signal.)