People are really upset at me right now.

My niece and friend were potential new homes for pups but there has been some changes since we las spoke about pup going to them.
My niece now works very long hours as a neonatal intensive care nurse and my friend just received promotion where he is required to travel alot. They don't understand that this is not good time for them to get pup. They both live alone so no one will be there to care for them.
Am I wrong? Everyone thinks I'm being to picky about where the pups go. I can't let them go to a home where they will not be cared for properly.
I just can't.