Dr. Howard Smith said “We have found that most other planets and solar systems are wildly different from our own. They are very hostile to life as we know it,”
The point is that the planets found outside are just too hustle for life. Even Gliese 581 which is the most Earth like planet ever found is still quite hustle to life since it is probably tidally locked to its star. The simple fact is that the more we learn about other planetary systems the less likely that there are any ET’s out there.