The problem is with Samsung unlike Apple is that they aren't great at handling international warranty and whereas if I imported an iPhone from USA and it went array, Apple would have no issue fixing it. If you import a Samsung device from outside your territory they will usually tell you that you need to deal with Samsung in that territory or with the seller. They don't seem to honour international warranties unless you are lucky.
So whilst I totally agree with you, they should take them back without question, I imagine this ridiculous bureaucratic warranty process will prevent some from being able to.
Apple worldwide warranty isn't worldwide ... https://discussions.apple.com/thread/4049298?tstart=0
Summary: No Apple stores in India means no service in India. You have to deal with the store you bought it from.