Margins.
I'm not trying to impugn the motives of the OPs dealer, but depending on the quantity buy of oil filters from Mopar, the dealer cost of a MO-889 is between $9-10 dollars.
Many (most?) of the dealers around here, Ram or otherwise, are using aftermarket oil filters. My dealer and the Ford dealer down the street use a filter labelled, 'Mighty.' I've been told these are about $5 dealer cost. My neighbor's Buick has a white oil filter that doesn't even have a name, just a part number. It is not an AC.
Regards,
Dusty
2019 Ram 1500 Billet Silver Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 3 June 2018. Now at 70140miles