It is hyperbole when the quoted post said "any" ship.
And as to your comment about transform instead of transfer, it would basically allow you to change a ship you do have into a ship you don't have. So its quite a world of difference.
Again, i see this as hyperbole, and not really addressing the core of the issue.
There's three "core" issues, and they all center around the concept of ship transit as a concept, as opposed to putting any form of delay on ship transit -
First and foremost, it cuts down busywork because you no longer need lots of little ships to move big ships around, instead you press a button once you get your fastest ship where you want to be and you can now bring your most suitable ship to the party as opposed to finding out where your most suitable ship is, flying a vessel over, going to collect it and THEN flying where you want to go. For this specific purpose, InstaWarp is pure win, it wipes out a lot of needless travel grind and thus far the best defense I've seen is summed up in THIS image!
http://goo.gl/q1Nuom
Then there's the people worried about exploits, such as refitting high grade combat ships with junk FSD's and using W-asps (Warp-Asps) or Taxicondas or what have you, and minmaxing their combat ships, thus upsetting the meta and reducing the number of ships seen in combat, the answer to that is "Eh, not really", at the high end the same ships will still dominate, and it'll just mean people adjust their loadouts accordingly. Now you don't have to plan around jump drives or fuel scoops, so instead of packing granola bars and bottles of spring water, you'll take beer and dope (ammo). The people who argue that ships which aren't even configured in such a way that they'd even get to Jacques appearing, eh, suck it up buttercup, your little safe haven might not be quite so safe anymore, as people say, it's called "Elite : Dangerous" not "Elite : Peaceful", so you might get a bunch of skrillex riders drop in with pimped out ships, so? Arm up and shoot them, THAT'S WHAT GUNS ARE FOR!
Then we get to category three, I like to call these people the wilfully blind. They're the ones who defend everything that benefits them, but despise everything that benefits anyone else. They'll swing for the fences when it comes to Engineers "Because it's part of the narrative" despite the Engineers being mechanically the most broken, soul destroying piece of garbage that ever got foisted on a game, because they've persevered and now they've managed to luck out they're in a position to say "Got mine screw you", but the moment that their advantages start getting whittled away, well, we get threadnaughts like this. They act only out of self interest, and should be entirely disregarded.
Instant ships(tm) would not break the game as they won't transport cargo, nor would they allow pilots to warp THEMSELVES anywhere, they just save on the busy work of moving lots of little ships around to get big ships where they need to be. At BEST they save traders a chunk of a run, but based on the cost that might actually not work out that profitable if they have to repeat that trick (because remember, they'll have to pay to Warp that Asp back to the start point if they want to do it again).
So many of these so called exploits are not properly considered in their entirety, they're just blind yelling about the sky falling down and well, it doesn't stand up to scrutiny.