Now, let's look at other guns...This is an interesting and ambiguous statement. You'll have to define "excessive" for us. Is 10 dry presses excessive? What about 100? 1,000?
The definition of excessive seems to be what's debatable. I thought about expanding that statement further, but honestly didn't think it would be necessary. Obviously I was mistaken.

I don't believe anyone could consider 10 per day excessive, but what seems to be debatable is 'where', between a couple Hundred per day, every day, up to a Thousand per day, every day to draw the dividing line. Everyone seems to jump in with their opinion, but nobody seems to have deemed the issue worthy of an actual study.
One person will inevitably state 'competitive shooters do extensive dry-fire practice between competitions', but what isn't known, is how often they end up replacing the roll pins as preventive maintenance.
I also did say '
can cause premature damage'... not 'definitely would'. and... this was simply to be an example for XD Striker Fire pistols... rather than a blanket debate I see on each and every forum. Again... merely to indicate that while it is a non-issue for M&Ps, it should not blindly be carried over to every brand without researching, as some here do own (or may later own) more than just M&Ps.
I glanced through the XD manual and found nothing. I'll leave it to you to verify what you said, but until you produce a page that states snap caps are necessary, the assumption is that you don't recall correctly.
As it's been a couple years since I've read through my XD manuals, I will defer to your findings.