They do, because when you order 30,000 smart phones at a time they custom program them for you..
But corporate discovered they could save 5 cents in licensing fees per ring tone they eliminated from the programming, for a total savings of $1,500 per ring tone over 30,000 phones. My personal old stupid phone came preloaded with 21 ringtones. Our corporate phones have 5. 16 fewer ringtone times $1,500 equals $24,000 in savings on the order. That certainly is worth the 10 minutes it probably took someone at corporate to pick the ringtones.
(They don't monitor if folks download additional ones at their own expense.)