But a Tony Stark did all those things and this Tony remembers doing all those things.
Adding captions to say, "Hey, remember this terrible story that happened 25 years ago? Well, now you do! It doesn't actually have any effect on this current story, but we're bringing it up just to acknowledge it! Man, that was a bad idea, but we'll remind you of it every time Tony remembers something! -- Ed."
It'd be sort of like, every time there's a flashback to a period before DOCTOR STRANGE 13 in 1976, adding a caption making sure people know that the entire Earth was destroyed and then re-created in super-fast time progression by Eternity, so the events that the current characters remember are actually an uncanny re-creation of the original events, not the original events, and the characters are all revamps, too. Or that all the other characters who came back from Heroes Reborn are also Franklin revamps, just revamps that are closer to the originals than Tony.
And since Original Tony's corpse (well, the corpse of the re-creation of Tony from after DR. STRANGE 13) vanished, amid a bunch of Franklinpower, current Tony can actually be seen as a merging of Original Tony, Teen Tony and Heroes Reborn Tony, just as the Wasp has all her memories of Original Wasp (well, post-DS-13-re-creation Wasp) and the body of HR-Wasp, and Hawkeye has the memories or Original-but-actually-post-DS-13 Hawkeye and the auditory canals of HR Hawkeye which have been since redamaged, and...
In the end, it's just continuity cholesterol that slows down a story without adding anything to it, so it makes more sense to ignore it unless bringing it up actually matters to the story at hand.
Which is how most history gets handled in serial stories. You bring it up if it adds to the current story in a useful way.
kdb