It's fact, pure and simple.
Don't like PVP? Then don't PVP
Don't like raiding? Then don't raid.
Don't like pet battles? Then don't pet battle.
Don't like riding yourself to locations? Make proper use of flightpaths.
Don't like feeling like you're not doing the travelling? Don't use flightpaths.
Don't want to fly? Don't fly. Plenty of people didn't in WoD even after Pathfinder was added.
Don't want to be grounded? Sorry, you're going to be grounded and like it. Compromise; You can fly once you've seen the content and done it 1000 times over as it pleases us.
And anti-flying fanatics still keep burping the same old tired arguments about how flying "ruins the game", "is for lazy people" and everything else over a feature that's been in the game since the very first expansion forward.
If I as a pro-flying player can
choose to play without using flying mounts for various reasons, so can anti-flying people... only, they're seemingly quite weak-willed and/or in some prestige race with every other player on their server...
It's been said before and will be said again; Flying is staying. The compromise is in place and sees players gaining access to freedom of flight long after the content arrives. If some people simply cannot enjoy the game as a result (pro or anti-flying), they can gtfo to games that don't allow flying/always allow it. Simple.