Other fat sources are healthier, and other protein sources are less perishable/risky. It is annoying to abstain meat in most restaurants, but this is rapidly improving. My own sweet spot compromise is ovo-lacto-pescatarianism. I eat lots of nuts, and supplement protein when I work out. Sugar being poisonous, I mostly substitute fats for calories. Works for me anyhow, once I got used to it. Maybe insects will be a thing some day