Or a slightly different viewpoint...

Cleat alignment is just as important on a spin bike as on the road. But it's simpler to adjust when you're spinning, because (1) you can have a real screwdriver or socket driver with you, and (2) the whole group doesn't have to stop for you to make an adjustment.

So if spinning is what you're doing now, and you can get the shoes and pedals you want, then you can have them in perfect alignment by the time it's nice enough to ride outside. (If you want to have a dedicated pair of spin shoes, maybe you can get a cheaper pair made on the same last as your chosen road shoes, and copy the outline of the cleat onto the other pair.)