To 'recater' a 737 takes minimal time - there is no justifiable reason to reduce primary door exits by 50% just to preserve the B.S. obession with 20 minute turnarounds.
Normally 31 minute turnarounds actually, 16 minutes for catering (single truck) and not a LCC either!
Any crew that allows this kind of breech needs their collective ar*ses kicked -
Never once questioned in 2 years by any crew!
PS: As a contractor, two trucks were requested by the customer airline!