The scale is not an obvious chefs tool and yet without it consistency becomes impossible. And if you don’t think consistency is important in cooking then think again.
You will, likely as not, have had a meal at a McDonald’s, a KFC or Pizza Express. Failing that you’ll probably know Nando’s or Leon or any number of well-known High Street brands. Their business relies on you having the same experience everytime. In other words you get the same burger every time. The fried chicken tastes the same as does your favourite pizza. Without the scale those recipes are not exact and cannot be reproduced.