I never speak in "absolutes". Mainly because in my experience people who do, are often absolutely wrong. I don't know if BF exists or not, but I tend to believe people of credibility until I know otherwise for a fact. If, in 100 years, it's existence hasn't been proven? It won't make a dimes worth of difference to anyone here anyway. If someone wants to believe in Leprechauns with Polka Dot boxer shorts, what is the harm? It doesn't hurt anyone.
I have a close friend who has a propencity for calling people out when they say something that he either doesn't agree with, or doesn't believe. A rather irritating trait, IMO. I tend to let people say what they believe, or think, and add a "grain of salt" if I don't agree with them or believe them. Speaking out only when it may be an immediately harmful or hurtful statement.
I will continue to believe that it is possible that BF does exist, and I will continue to believe "credible" people. If they are wrong, no harm done. If they are proven right, then the "absolutists" will have to shift their denial to Leprechauns with Polka Dot boxer shorts.
In the meantime, until BF's existence is disproven. It doesn't hurt anything or anyone and fuels the imagination, and the hope that there is something remaining to be discovered and / or seen.