I don't mind paying my local breweries $10 for a sixer. Doesn't bother me at all. They don't have the scale of the big boys and they generally brew better beer. But I buy craft beer as a treat. My daily drinkers are beers I brew. If I didn't brew, I'd still find a cheaper alternative for daily consumption. Think Bitburger, Genesee Cream Ale, etc.
Since craft beer is more of a treat for me, I have no interest in 6 of the same beer. If the breweries don't want to sell a mix -six, that's their prerogative. I have other things to spend money on.
"If more of us valued food and cheer and song above hoarded gold, it would be a merrier world."