I think from your POV that banks are horrible, thinking that even depositors should lose their money is in fact a defensible argument. So I concede that your view is one I can respect despite disagreeing.
But in my view, banks are a useful fiction because of the utility they provide (specifically easy storage of and convenient access to money). Even if a person can buy property to reduce bank risk (again, a super inconvenient workaround!), I’m not sure I want _businesses_ to be doing so, especially in light of the likely resulting impact on property values. I acknowledge a system relying on banks indeed has risks, but to me that’s a stronger argument for better regulations and protections to mitigate the risks than it is an argument to dissolve the system and lose its benefits.