On a side note I will say I was wrong before to say that Buddha did not teach about rebirth. If we look at the Suttas he obviously did and because of that he obviously seen some value in teaching others about the concept. The reasons why though, I do not know. If I am honest I personally do not see the need for it, but thats just my subjective preference, which is not a good indicator of truth (As Ajahn Chah said, following our desires and preferences wont get us to nibbana)
Also, in terms of D.O. it can be read as both psychological and literal in the Suttas (or maybe intended as both, where clinging gives birth to "me" which can carry on after physical death).
The reasons for Buddha teaching about rebirth after death to some people, I do not know. I don't know the Buddhas intent, by that I mean I do not know if he meant to use it as a skilfull means to help others aim at wholesome actions (which helps to then lead them to his own teachings) or if he taught it as being an empirical fact, that he either believed or knew about.
I can see both in the Suttas
As I said before however, I think its how we use these views that is important, not the views themselves
After all we all aim for nibbana, which is the ending of birth here and now and after (if it does happen).