The Many Worlds Interpretation. Real world science, an interpretation of quantum mechanics.
I'm no expert, but there's the belief that there's infinite versions of our world that exists out there with an infinite number of differences caused by an infinite number of different choices/outcomes. That isn't the same as a universe literally popping into existence because of each decision is it.
So, if they blow up Romulus in a movie set in the prime universe its okay?
What hasn't been clear? If a prime-universe tv show/movie blew up Romulus then chances are they'd actually be dealing with it - that's fine. But nu-Trek just blew up prime universe Romulus when the film isn't even set in the same universe and have zero intention of really dealing with the consequences on the prime universe. Its not difficult to understand the distinction.
What it all amounts to is that some people just don't want the new STAR TREK because they feel(incorrectly and absurdly) that it defecates on the memory of the old TREK and its characters.
I've said roughly a bajillion times that my main issue with it is how much of a waste it feels that their reboot/alternative universe is just throwing aside years and years and years of world-building by very talented writers. All so paramount can dredge up the past and trot out the names of the original TOS characters to get people to see their movie. Which is where the whole "cynical reboot" thing comes in.
And, besides, it's still the same as what happened to Cardassia. They ruined it without any intention of going back and exploring the fallout.
Ok there's no way you can see that as directly comparable.
First of all, Cardassia was not wiped off the face of the galaxy. The Cardassian homeworld is still intact and Cardassians will still live there.
Second of all, as I've explained before, Cardassia was DS9's baby. The writers of DS9 spent 7 years fleshing out that whole region of space, they earned the right to bring their stories to a meaningful conclusion. Now if in the DS9 finale we saw Troi coming to visit DS9 in a shuttle and it exploded, that would be a different matter, albeit hilarious.
TREKs 2009 and 2013 are helping keep the franchise profitable and breathing. I, for one, am forever grateful to Paramount for giving the franchise another chance at glory in the wake of the failures of NEMESIS and ENTERPRISE. The studio took a chance and reaped the rewards, and we the fanbase got to see our beloved TREK once again. It was a win-win for both sides.
So is that really that matters most to you? That the franchise you're a fan of is profitable? Does that mean that NY yankees fans should be happy if the team doubles its profit by just renting the stadium out to concerts and hardly ever playing a game? Oh and I don't remember seeing my beloved Trek again, I remember seeing an enjoyable movie that basically didn't resemble Trek in any way and I think anyone who says it did feel like Trek to them is probably deluding themselves.