Read Stanton Friedman and others on such issues. Your assumptions are ... dated.
Now who would be you are better off believing? Albert Einstein or Stanton Friedman? Hmmm.... Most people would choose Einstein. However a belief in alien visitation has less to do with physics and more with evolutionary biology. Humans are the only species known that are capable of advanced mystical thinking. Some believe in ghosts, goblins, ghouls. Others are gratified with yoga, pet rocks, astrology and seyonces. Some think deeply and have their emotional and need for mystical expression exercised by a belief in aliens and an entire narrative that goes with it. That is not to mock mysticism. The human capacity for mysticism may be critical for creativity and inquiry as well as emotional gratification. In the final analysis, physical alien visitation is just not possible, however desperate and important it is for some people to fervently hope it to be true.