Sure but you should be counting your saturated fats if you’re counting your fiber and protein intake as well as everything else. I make my own mayonnaise.

Ok. Maybe it wasn't the best example, but my reason I avoid things like mayonnaise is because they add lots of fats and calories without making me feel full. Most of the commercial mayonnaise, in my part of the world, doesn't have a lot of proteins (even if in theory the eggs should be there), and have lots of saturated fats. So I prefer to fill the calories counter with more meaningful choices. For example I very much prefer having 20g of nuts instead of adding mayonnaise.

All in all. That was an example to make a point. I also don't eat butter.