Is inability to disprove a reason to believe?

Someone said:
"we can't prove that elves don't exist either. The only logical thing is to assume they do. Yes, God exists. And so to elves... And dragons. We can't prove they don't exist, therefore they must exist."

Here is a response:
are you proposing that there is evidence that suggests the existence of elves etc? Are you proposing that the evidence for elves etc. is in someway comparable to the evidence for a Creator?
I have not observed that billions of people on every continent thru all of human history have claimed to interact with elves.
Is there some other evidence for elves etc. that I have not encountered that somehow makes this in an way, even remotely comparable for the evidence for a Creator?
If so, please expose me to this evidence or claims of such interactions.
Being unable to disprove something is not sufficient to conclude that it is reasonable to believe in it. There has to be substantial evidence or people claiming interaction and those claims need to be thoroughly evaluated for internal consistency. If there are inconsistencies, these need to be evaluated and answered.
Reasonable belief is much more complex than just inability to disprove something.