It’s not faith, just an evaluation based on the recent discoveries that conditions are good for some form of life to develop in our solar system. I can only hope to live long enough to witness that if it does occur. I think the biggest obstacle to discovering life is our commitment to seek it out, not the improbability that it could exist elsewhere.
I write science fiction. When asked in an interview if I expected to meet aliens, my answer was: “Yes. No, they’re not dropping by every Tuesday dragging out grandmas for probing. However, I expect to meet them in my life time. Whether genetically engineered creatures or artificial intelligences gone sentient or uplifted dolphins or the next evolution of humanity, I don’t know.”