There are religions, if we are to call them that, which may make it very disadvantageous to believe in a deity.
If Buddhism is correct, and we must become enlightened in order to reach nirvana and stop the cycle of rebirths and there are no deities, it seems likely that figuring this out, on some level, may well be a part of enlightenment. And I think it would definitely be a sign of being far from enlightenment to try to "trick" oneself into thinking that one believes something which one really does not, especially for reasons of trying to get the most comfortable spot in the afterlife, brushing away principles. What could be further from realising one's buddha nature?
(Plus, don't you think an omniscient deity would have figured out your little scheme?)