Why is this an issue for some fans?
I loved that they built the old girl on Earth. Even later on in the movie you see a ship much like the TOS Enterprise sitting on top of a scaffold where Kirk boards the shuttle after giving away his motorbike.
If they can build them like this I'd assume they can all make surface landings, but why would you want to?
I had no idea anyone had an issue with this.
The only reasonable reason I can think of for being against, and it's no reason to get heated, is that there are more resources, more accessible in space than on Earth. Secondly, if the ship is supposed to be in space in the end, it makes more sense to build it there in order to avoid the lift costs to orbit. However, cheap antigravity and cheap antimatter make the lift expense point meaningless. That leaves resources, but planets have sufficient resources, and a planet like Earth, which is not a colony, is bound to have more industry on its surface than in space.
The two best argument for building ships on a planet are gravity and air. Gravity means material won't just drift away if it's not tethered down, and in some ways that is very valuable, although a weak gravity like the Moon's is better (but there is dust and lack of air). Air means no need for space suits, and spacesuits make all manual tasks harder. A couple centuries from now a swarm of robots should be the work force which would eliminate most of the space suit issue, but if you have to use people, or if it's merely preferable, then it is preferable to use people in air, in gravity.
The Enterprise's shape is not suitable for surface landings, it would sit on three points: just under the deflector, a nacelle end, and the saucer edge. Very awkward. Even though it was built on a planet's surface it was supported in a fairly well distributed manner, so the three point position could lead to very high stresses on the hull. It would need a cradle to be sure of avoiding damage.
On the other hand, the USS Vengeance sat on San Fran just fine as far as we could see in the movie. But, all that means is the Vengeance an do that. Also, it was built in space as far as we know, unlike the Enterprise.
Me, I just like what I like. And I don't mind people not liking something either. It just kinda gets me when you decide to hate nuTrek because the Enterprise looks different. To me, personally, that's not a valid reason. But.... each to his own.
I've seen plenty of arguments for and against the film which don't revolve around insults, and plenty which do. I feel like people who insult other people over something like this must feel it is a threat to their own thinking and desires.