These living creatures can't be brought back. Do you have the wisdom to tell which creatures are pillars of their biome? Further, do you alarm when the match is lit and the flame is spreading or do you wait until your home is already aflame?

I don't think you are a bad person. I suspect you and I grew up in a time where species dieing out is the norm as opposed to the exception, so it simply doesn't stick out for you. Its just how the world works to you. But it is recent, and I'd argue we're making a poor trade as a species, trading bio-diversity for.. frequently, strip malls or strip mining.