Players considering Stake most likely don't have Pinnacle as an option, or aren't considering them anyways.
In terms of KYC, I agree that Stake is better since Pinnacle has that requirement though I submitted my KYC there anyway since I was tempted by their odds which proved to be a good decision on my part in the long term.
Stake does not have any KYC and that is why I have an account at stake. I do not prefer to play on casinos who make KYC compulsory for without any reason.
KYC is not as bad as you guys are making out to be. Of course you are free to pick a website that doesn't have KYC at all and nobody could say anything about it, if you do not want to play on a place that has KYC that is your own decision. However KYC was created not by the casinos but by the governments, to prevent money laundering and black money coming into market which is not really a bad thing, you might see it with intervention of government on your money but it is still a legit deal, plus it is probably used on taxes as well where if you try to avoid taxes you will be caught.
Now I know that people do not like it when governments take taxes so if you can avoid it you will want to, but it is also governments job to make you pay those taxes as well. All in all, KYC is not a bad thing, it is a legal related thing and you should not really be hating it, or at least hate casinos for it.