I feel the need to reflect on the term restrictive… I visit and identify multiculturally and globally… and I think the western diet is terribly restrictive. So much so that it’s cruel to deny children so many of the wonderful healthy foods available on this planet because it’s not common to you.
Eating is habit. If you’re used to drinking lighter fluid daily and you suddenly have to stop, it feels restrictive… to you… because of your habit. The abstinence from lighter fluid is not restrictive intrinsically. No one else would say it is. It’s only restrictive to the individual who has habitually addicted him/herself to that material.
So carbs are both unnecessary to good health and addictive… as is alcohol … and tobacco… is it restrictive to tell kids not to drink or smoke?? To those who see it as the norm, sure it is… to others in societies where these are considered dangerous, it’s not. I think giving fruit juice to a toddler is equally dangerous… is it restrictive? Depends on your norm and addiction.
I think dogs love the taste of antifreeze… yet we restrict it… poor puppies, big sad puppy eyes… how cruel we are…
But back to the cultural element… western foods are mostly devoid of small mammal meat (go to Africa and parts of Europe)… restrictive?.. how about live fish and octopus (go to Korea), how about insect protein (China), or snake meat (India), organ meats like cow brain (Egypt), fermented shark (Iceland)…
Personally I think the regional bans on foie gras are terribly restrictive… my addiction shows itself. 
So it’s addiction, habit and norms. The keto lifestyle doesn’t need to adapt to any one society’s expectations on norms. As those who adopt it live longer and healthier lives, we will financially turn the tide. As we educate our families and they see the benefits in our lives, we influence the norm.
Just an alternate viewpoint on “restrictive” in a society addicted to carbs.