Other Life Forms

Why is the idea of another life form in the universe so objectionable and ridiculed? To imagine that Earth in the universe is the only one to have life of any development out of the hundreds of billions of suns (like our own) is somewhat limited thinking.

I find it quite likely that not only are there a great many different forms of life - aliens being just different to humans - but there will be many of a very much greater advancement than us. Some not so advanced.

It's a certainty really.

Is there a fear of the possibility so it is rejected out of hand?

Sort of 'head-in-the-sand' attitude: ignore something so it cannot exist?