Everyone keeps parroting this same statement because they don’t really understand how commercial real estate works. First of all, there are many creative ways to exit a commercial lease. I won’t go into it, but do some research. Landlords would rather have a paying tenant in the space than go chase a bankrupt company in court. Second, they are charging several times the PSF rate they are paying to the landlords, which acts as a hedge against volatility. You pay a higher interest rate for higher risk credit - this is basically analogous. Third, there’s nothing stopping them from subleasing the space to larger, lower risk tenants if the market calls for it.
Source: I work in commercial real estate.