Why do you destroy other animals homes to make your homes?

Because we do and not to be rude, but I think that us humans are selfish for taking these beautiful animals homes to make our homes. And also, I was the one who wrote this question. And I made a few mistakes too. I made this question for a reason. To tell everyone that we should not take the animals homes to make out houses. Why don't we live in caves like bears, or trees like birds? Because we only care about us. ( this is what I think) But there could be other reasons why. Thank you for having your time to read my little speech. I also did this is because I was really really bored.