Your premise is incorrect. The burden of proof for quantum mechanics is on the people claiming they exist. They provided those proofs, which is why people believe in them. I haven’t studied quantum mechanics, but if you asked somebody who does, they could offer proof or evidence. And if they couldn’t, then your claim it doesn’t exist (until proof was proffered) would be correct.
Your premise is incorrect. The burden of proof for quantum mechanics is on the people claiming they exist. They provided those proofs, which is why people believe in them. I haven’t studied quantum mechanics, but if you asked somebody who does, they could offer proof or evidence. And if they couldn’t, then your claim it doesn’t exist (until proof was proffered) would be correct.
It was on them until society generally accepted it. Now if I claim it doesn’t exist, the burden is on me.
Or how about this: if I claim dinosaurs never existed and thus the fossils didn’t come from them, it’s not on you to prove they did.