There's the slight problem of having no practial way of knowing which set of headphones will work properly; even most reviews skip these crucial details and just talk about the "warm sound" etc.

If the headsets were marked with things like "kinda works as long as you hold it right", "works ok as long as you have a Samsung phone", "works flawlessly when paired with both your phone and your computer at the same time" at the time of purchase, I'm pretty sure people would let it affect their choice.

That's one of the benefits of staying within your ecosystem of choice; if it doesn't work properly Samsung or Apple can't blame it on someone else - it's their problem to fix.