It all has to do with pricing of course. They had to get a bike in the 400K range to make all those people pull the trigger. Sure ABS must be great on a bike, but it is not a deal breaker for people who want to buy Ducati Monsters at 400K in Thailand. You might get your ABS on a 795 Monster someday, but it is of course going to cost you.
What better advertising then getting more Ducatis out there seen on the streets.