I am doing my first Whole 30--or technically not doing it--because I accidentally used some leftover broth I had without checking the ingredients (sugar, but not enough to make the nutritional facts) and ate some non-dairy yogurt which I thought was Whole 30 (it's not--oat fiber whatever that is). I wouldn't be surprised if there are just as many people who see a benefit from Whole30 following the rules 100% as there are people who see a benefit from Whole30 following the rules, say, 80%. And I am sure there are plenty of people who it does not help at all, regardless of how "strict" they are. Everyone is so different. If it's important to you to do a strict Whole30, I say go for it, but I don't think you should discount any progress/benefits/improved habits you see just because you're not "following the rules."