Just because you don't care that the environment is suffering, and resources are being wasted, because instead of fixing things people throw them away doesn't mean that helping to mitigate those problems doesn't benefit you.

Or to use a crude analogy: just because babies don't care about having their nappy (ie diaper) changed doesn't mean it doesn't help them.

Look up tragedy of the commons. It is for the end-user, they just don't know it yet, believing that it is 'not their problem'.