Hmm, this topic (why isn’t perceptual intent different from relative colorimetric, etc) has been discussed quite a bit in this forum, for example:
There’s also this:
which has a link to a nice Cambridge in Colour tutorial on the topic of rendering intents. Unfortunately the C in C tutorial fails to mention the difference between matrix and LUT profiles.
@patdavid - somewhere on this forum is a proposed list of topics for tutorials. My apologies, I’m not volunteering to write a tutorial on this question of “why doesn’t the intent make any difference”. But it would make a nice tutorial, and I’d be willing to proof read it for technical errors, if someone else wants to write a tutorial on this topic.