How is transwarp beaming less credible than the normal beaming from one place to another without a receiving chamber. Its all made up - if Abrams et. al wants it to work, then it works.
You had Gary 7 'teleporting' across the galaxy and people didn't put up their hands in horror.
Of course its a stupid idea for Star Trek because getting stranded on a planet is one of the excitement mechanisms of the franchise. Now when people are in trouble half-way across the galaxy, then all Starfleet has to do is beam in a marine force based on Earth.
Actually why have ship at all - just beam everywhere.
They have the same problem with the replicator. If you can replicate anything, why grow crops, trade or build anything. Basically that aspect of the replicator is mostly ignored - thank goodness.