The prospectus is easily available, for all the good it would do.
In any case, you don't need to be a sophisticated investor as a depositor. Ordinary market participants manage 'flights to quality' just fine, even if they are not sophisticated investors. See https://en.wikipedia.org/wiki/Flight-to-quality
If you want to have a stable financial system, you shouldn't suppress the incentives for people, including depositors, to look for safety. Just the opposite, you should have them sensitive so that they make moves (on the margin) long before danger is serious. Have people move their deposits _before_ it's too late.
In any case, you don't need to be a sophisticated investor as a depositor. Ordinary market participants manage 'flights to quality' just fine, even if they are not sophisticated investors. See https://en.wikipedia.org/wiki/Flight-to-quality
If you want to have a stable financial system, you shouldn't suppress the incentives for people, including depositors, to look for safety. Just the opposite, you should have them sensitive so that they make moves (on the margin) long before danger is serious. Have people move their deposits _before_ it's too late.