I would also dispute your contention that owning land is risk free. If you bought property in the last few years the value has properly fallen now.
Value of the land only matters if they have borrowed against that value where the whole merry go round starts again!
Always used to wonder why commercial property was allowed to stand empty. Surely it made sense to let it out at a reduced rate, so that some money was coming in? Then someone explained the above to me, and it all made sense (well, sort of).
Yes, RK is quite right, if the lessor reduces the rent it devalues the property and that can be devastating to a balance sheet based on borrowing against asset values. The sham value remains on the BS until a (say) 5 year property revaluation or earlier if there's a company sale event or auditor enforced revaluation.
I accept that with our complex economy few entities are any longer pure "rent sinks" because the temptation to borrow against land and property value to get more cash right now is sooooooo tempting with rents paying back the loan (until there's a 1 in 100 year financial crash).