Not really. "You should prepare for the chance of losing access to your computer for around 4 days" is not reasonable.
One expects the worst case scenario to be a full restore, which takes a few hours.
Again, it's a Developer beta.
These betas are designed to give developers - folks who develop - a first chance to start updating their code for the next OS.
It comes with several caveats. Like, for example, don't use it on your primary machine.
We have an in-house Dev team. The order there is no one is permitted to start with Big Sur on their primary machines until the second public beta. If anyone wants it beforehand then, well that's what we have Virtual Machines for.
You want to misuse a Developer beta release because you don't have patience for the first public beta, then go right ahead.
However the risk is 100% on you. Congratulations, you found a bug. Now, quit complaining that you found a bug.