My dogs prefer to be outside

I have two Pomeranian’s who have access to go outside whenever ever they want. They spend the majority of the day outside ( playing, running around, sleeping etc) at night it’s starting to get harder and harder to make them come in as they prefer outside. I’m planning on getting them a dog house for outdoors . I just feel bad as everyone says dogs shouldn’t stay outside but mine honestly prefer to not be indoors. Should I just let them be and let them stay outdoors?