If we oversimplify everything, yes... it's all about prop up real estate prices. But if we want to talk about this, we need to have in mind the capital amortization. The value of every business goes up or down if their fixed capital gets old or unused. For example, if you have 100 computers and every computer costs 1000, your company has that value as capital. But if they lose value in the next years and those same computers have a value of 50 in the market, then your company's value is halved (oversimplifiying it). The same happens with buildings and offices, if they lose values the company loses value too. Forcing workers to move to the office gives value to the area and the building, and the buildings around, and that's one of the main reasons why they are forcing the back to office thing.
If a company leases their building (and I think most do) then the capital value is of little interest to them and won't influence these sort of decisions. The businesses that are struggling through all this are their landlords.
Not all, and even that, leasing is a cost in their accounts, which is good. Those companies that have huge ammounts of benefits need huge costs to maintain a propper balance.
