Manual vs Power Steering Shafts

Can i ask why you dont want to use an adapter? As about to purchase a manual box for my one and going to use an adapter that comes with the box. Is there an issue with the adapters?
I'm not opposed to using them. It just a matter of economics, at $131 plus shipping being the cheapest and up to almost $200 the ones, I've found, it just seems ridiculous, but these are the times.