does it bum anybody out that time travel won't ever be a reality?

now this assumes a lot of course. if time travel is eventually a reality, then i suppose either a) time traveler has traveled in secret b) have no interest in traveling back to our time or c) can't travel too far back

But still you'd think if time travel was a possibility we'd have existence of it. Since there hasn't been any legitimate proof, it makes me think it'll never be relaity.