I'm sure some of them are, but those flats are very new and were highly controversial when they were built, because they're visible from the much-loved Port Meadow. The anti-railway sentiment was and is mostly from people who live near Wolvercote roundabout, who complained variously in the local media and at public meetings about noise, extra traffic generated from Oxford Parkway being a danger to local schoolchildren ("won't somebody think of the children!") and roosting bats in Wolvercote tunnel (which, I may add, is under a major roundabout and thus not the tranquil rural idyll most people think of when they hear "bat roost"), but actually what was at the root cause of their objections was the belief that a more frequent train service would cause vibration damage to nearby homes. Nowhere was this more obvious than when Chiltern Railways and Natural England devised a solution to the bat roosting issue and the residents still objected! Notwithstanding considerable reassurance from everyone concerned that the noisy jointed rails would be replaced with the continuously-welded type, that modern trains were not as noisy as the half-remembered heavy freight trains of the 60s and 70s, and totally ignoring numerous studies, calculations and demonstrations that train vibrations were mostly going to be eliminated and didn't damage houses anyway...
North Oxford, sadly, has a significant minority of wealthy, well-connected, retired people who do their best to set the whole place in aspic. Very few places have such a high class of NIMBY - injunctions in the High Court are rarely a thing that has to be contended with when you build through a poor area!