I'm not sure I would agree with that at all. The potential market for the station is absolutely massive for a city suburban station.There is absolutely no market for that station so five per day is generous.
I've just had a look at Peartree (sic) station on Google earth, and within 800m of the station there is a massive residential population. Within 200m of the station there is a leisure park with a multiplex cinema, bowling alley, and associated restaurants, a premier inn, and a retail park with a massive Sainsbury's supermarket.
Pear Tree is a very big suburb of Derby, and if it was proposed to build a new station at the location, the proponents could probably come up with a very advantageous benefit to cost ratio to support it.
The issue is that the local population probably don't use the railway because of the infrequent service pattern, coupled with regular bus routes through the area into the city centre.