Though I'm a meat-eater, I upvoted this for the unvarnished truth it contains.
I still get fried chicken with my significant other (who follows a normal Western diet) sometimes, as a guilty comfort food when I'm struggling mentally or especially stressed.
I still eat mayonnaise and margarine when I'm visiting my parents, because I don't want to hassle them to buy the vegan variants just for me, and I decide that I am willing to use those products occasionally, knowing the suffering that went into them.
Very few people are 100% perfect in following their chosen diet - vegan, vegetarian, keto, weight-loss, etc. The important part is to try your best, and bear in mind the consequences of what you're consuming.