No reason at all not to, it's sort of a poor man's pre-lube system, it is kinder on the engine. You will be pumping fuel
into the cylinders that won't be burned off until there is compression
, but unless you get silly with it and spin the engine for a long time it should make no difference. I think it's kinder on the starter, flywheel and starter solenoid too.
For those that take the approach of if it was better the manufacturer would recommend it, I offer this thought. If a manufacturer recommended this procedure, all the other manufacturers sales reps would use it to show how much better product they had because theirs didn't require anything more than turning the key.