If someone claims there is a teapot floating in space, cool, they need to prove its existence and the rest of us can go around as if one doesn’t exist. If someone claims there isn’t a teapot floating in space, now the burden of proof is on them.
Disagreeing with the first claim doesn’t put the burden of proof on you. It merely keeps the ball in the first claimant’s hands.
You can believe whatever the fuck you want; you just can’t prove it and, in most metaphysical cases, you can’t disprove it either.
Again, nobody is expected to disprove metaphysical claims. Claims for the metaphysical should be proven by whoever is making them.
Trying to disprove something that hasn’t been proven to exist could be as easy as saying “It doesn’t exist because it doesn’t exist”, and that would be logically and factually sound.
The person who is holding the belief in god(s), ghosts, UFOs, Bigfoot, Santa Claus, Men in Black, a flat earth, a young earth, and anything else you can dream up is the only person who has to justify those beliefs.
This is why I wish we had more people like James Randi around, who put up real money to anyone who could prove their claims of paranormal, magical, psychic, or other metaphysical claims to be true. In over 50 years, nobody could prove what they claimed. Randi didn’t have to disprove anything.