there are 100 billions of galaxy in the infinite universe, in one galaxy, thousands of planets.... napaka selfish mo naman kung sasabihin mo na ang earth lang ang habitable planet.... common sense lang.... lets say, 0.000001 percent lang ang chance ng bawal planet to develop an intelligent life, chances are still huge sa dami ng galaxies in the universe...
actually bawat rock o planet sa space ay may lifeform ang NASA lang nagsasabi na wala kasi para sa kanila ang lifeform lang ay ung katulad ng tao pero maraming klaseng lifeform na may elementary at advanced ang itsura at ang pinaka advance ay ung plasma form
in my own perspective and research alien are real that have two categories ones are malevolent beings who are 3D/4D for example Reptilians, Draconians and etc and the ones who want peace and harmony are benevolent beings Andromedian, Lyrans, Pleiadeans and etc. They are 4D-12D and higher Dimensions. Don't say that they are Aliens because we are the same as them. We choose to reincarnated here on Earth realm to experienced living in 3D above a planet cuz all planets around the multi universe is Hollow and it have beings living in it.
If you want to read more about our Brothers and Sisters feel free to message me. Namaste