You are not forced to use it . If you want to be competitive sure.
This is the same like:
Ressource in the inventory isn't good at all. Why?
You are forced to use it every time!
If you don't, your opponents will get an advantage.
(Imagine having missing like 400 clay, 204 wood, 522 iron, 1999 wheat I have to waste 48s of my life into open those box instead of waiting it for 15 min. My opponents will get an advantage of it)
But if you have to use it every time, then playing becomes extremely viscous and arduous.