The thing is that the SPE is absolute requirement for WeWork. They will walk away if you try to challenge them on it. It's ultimately not an issue unless shit hits the fan. Smart underwriters will recognize that and price it accordingly. Unfortunately, there will be many that don't and execs that are trying to push value, so won't want a conservative view on those leases.
The biggest risk (outside of WeWork itself) is bullish investors buying properties at inflated values due to WeWork being on the rent roll, not doing their due diligence on the WeWork lease, and the bottom dropping out.
As polygotdomain wrote landlords know that want We on the lease, ask for it, don't get it, and sign anyway. Short of a smoking gun showing outright fraud courts are unlikely to disregard that bargain.