I don't see why magic would cause issues in the first place. If archery is possible, so is a fireball.
Sure, some could say I have no right to be upset because it's free, but if the government started giving out cheques for a 100 dollars US or CAD, but said "Hispanics,natives,Africans and Jews don't get anything sorry" there would be a huge outrage. Why? Not because they want $100, but they have been left out and now feel jealous while everyone else is having a grand ol' time. Same applies for Skyrim.
You're getting exactly the same thing everyone else is getting. The difference is that you don't want it and/or won't use it. Completely different scenario from the example you gave here.
Yeah it's not even remotely close to that. There are technical hurtles and differences between adding the use of certain types of combat. Not giving money to a certain people is just being a dike, here they have a lot of work to do to make it happen. Not really the same.
Oh hey look, absolutely useless updates that have no impact on gameplay because horses are horrendous.

Don't you see? This makes them far less horrendous. Now they have far more use, since you don't have to demount to fight.
May I also note that it appeared that when dismounting during combat, that my horse ran and waited nearby, instead of fighting and dying!