My 2 cents:

This is a market focus thingie (sorry for such a tech term).
Regent (Apollo) is aiming at a market target. I believe that that target is those with lots of money. That is to say... those who can easily write the check BUT those who want value for said check. (note: most people with lots of money are not stupid.)
So, Regent ups the per diem and delivers a truly all-inclusive cruise.
Cruisers have an easy & delightful trip. Everyone is happy.
Also remember that people with "lots of money" tend not to be twenty year olds looking for dangerous excursions. Bus trips will do nicely, thank you.

I do wonder about all the advertising, though. It must be costing a small fortune. Postal mailings, ads in major travel mags and the amazing number of web ads. I know that they are cheap per showing, but they are everywhere!

So I think we are all agreed that Regent will be sold...some day.
When? Who knows? And remember that a new owner might do things better. Or not. Who knows.

Just my 2 cents. Doug