Use Small Business Safe Harbor to Qualify Rental Property for QBI Deduction or Not ?

Am trying to determine whether or not to elect to use the safe harbor for rental property or not.

(IRS notice 2019-07).  It is a commercial property (office condominium).  We satisfy all the criteria (separate books and records, 250 of rental services documented with timesheets, etc., is  not a residence, is not a triple net lease, was  not rented to a commonly controlled business).

 

In TurboTax Home and Business this rental property comes out on Schedule E.  If I elect the small business safe harbor, the QBI deduction IS applied, and if I check the box "None of these apply", the property still qualifies for the QBI deduction.

 

So -- am trying to understand the "why" to elect small business safe harbor -- when the QBI deduction is applicable for both scenarios?