

What you’re saying isn’t the ‘current best guess’ though, it’s a fringe theory which relies on some incredibly speculative concepts with no evidence to back them up (i.e. the assertion that, if you created another brain with the exact same configuration as your current brain then, your conscious experience would automatically transfer over to it. We have absolutely no reason to believe this is true, whereas the concept that the destruction of your brain results in your death is well supported by the available evidence).
The glass is always full, it’s just that some of what it’s filled with is air.