Scientist may be hesitant to "shout" out that they have found new life, because of the repercussions it may cause on the world as we know it today.
If people knew that there WAS life on another planet, the world would change almost immediately.
The way people think would instantly be transformed, religion would almost become non-existent.
Trust me, there are plenty of reasons "WHY" they wouldn't just say they found life.
Although, if they found another planet that was possible to live on, they may shout that out.
As far as life being out there beyond us? VERY POSSIBLE, almost MORE possible then IMPOSSIBLE.
Remember, it is idiotic to NOT believe in something JUST BECAUSE you can't see it.
Age old quote.
The fact of the matter is, for all we know, & pretty much what we all believe, is space is infinite.
Thus why it's called SPACE.
To think that WE are the ONLY living creatures in this INFINITE amount of SPACE seems more impossible then possible.
There is literally TRILLIONS of planets out there with TRILLIONS of galaxies, not even trillion, so many we don't even have a number for it.
Tell me how we were so lucky to be the ONLY ones?
It's not impossible to say were the only ones, but very unlikely.