But seriously, I do think the OP has a point about one thing. I think whey powders are processed foods and therefor not really Primal. I don't think the hemp and rice powders he's proposing as alternatives are any better though. Hemp powder tastes like essence of sweaty gym socks too. Blech.
I think the OP is off base about dairy IF a person can find quality dairy that is organic and from grass fed cows and raw. Each person has a different place where dairy is or isn't a problem for them. For me, high fat, fermented dairy from raw milk works fine. Some people need to make ghee out of their butter because even that much in the way of milk solids is a problem. This is an individual choice based on differing physiologies.
Personally, if I want a chunk of protein, I would eat some meat or a can of fish post workout. Whey, for me, just seems to make me hungrier than I started about two hours later. I have stopped using it altogether.