Because it's financial engineering. You get to sell off the property, get a one time bonus, and next year paying the rent becomes somebody elses problem while you're sipping margaritas around your new swimming pool.
I'm confused. The company engineered the right to some office space, the landlord engineered a stable income to pay the mortgage, and the bank engineered a loan that pays them interest. Who has what problem? And who got a bonus and retired?