It's not lol. It's more akin to construction. If you need 100 people to do a job in a given amount of time, you might be able to get it done with 99 people without issue. But that one person might have had an insight that would save you a lot of money overall. And if you kept getting rid of people, at some point the others will not be able to pick up the slack and might even ruin the project unwittingly.