I agree that most PC sound boards are rubbish which is why I have gone for upgraded boards in the past (both internal and external). Apple pcs are better in this respect but (in my experience and opinion) still not good enough.
I will concede that Mac's are easy to use and that has some appeal to certain users but on sound quality, I think the latest batch of pi boards are far superior. Yes, there are better streamers, but you have to spend an awful lot more for a small improvement.
Geoff