No evidence is not proof that something does not exist.
Of course it isn't, but it's almost impossible to prove something doesn't exist. If something DOES exist, there will be evidence for it, though it may not be easy to find, if it doesn't, there won't. Doubt logically has to be the default position until evidence is produced.
It is only proof that you have seen no evidence that something does exist. If from that you wish to reject things that others may believe in that is your choice.
I reject things on the basis of the evidence, it's not a choice, it's a reasoned conclusion. I freely concede there may be many things I'm wrong about, but anyone who wants to change my mind has to show me the evidence, make the case. I'm interested in what's true, not what others might want to be true, and there are many ways people fool themselves into believing things they want to be true. If they can't make the case for their beliefs I see no reason to accept them as correct.
Fish all day in a lake and you don't catch a single fish.....does it mean there is no fish in the lake?
Insufficient evidence to justify that conclusion.