There is this thing called quantum mechanics that goes beyond the limits of our set laws of physics.
Well... I can lead you to the answer to life. (your evidence)
You will find that tardigrades live in every nook and cranny of our planet. They can survive the vacuum of space (all the nasty stuff that goes with open space too i.e. radiation) and go into hibernation for long periods of time until conditions are right for life. They survive extreme heat and cold.
Does it mean we came from space? no... Does it mean there is likely life inside our own solar system? Likely, yes.
Does it mean there is life in the infinite span of the universe? No... but the law of averages does about 10 billion times over.
You see the problem with life migrating from planet to planet // solar system to solar system... the distances are HUGE even going at the speed of light.
I believe (as should you after you research it yourself), life is part of the formation of planets. Ours is just perfect for it to flourish to what is has become.
Space is manipulateable and just because something in space is too far to be traveled by conventional means, is also only limited by what you believe is actually possible. With enough energy one could potentially gather a large amount of space in to a coalesced form, punch a hole through it, and travel that great distance in a matter of seconds.
Do not think that mankind's tenuous and miniscule grasp of simple laws of physics are the only explanations.