I didn't get the meaning of your quote really.
Uber doesn't have control over orders.
Uber does have control over the number of drivers.
What it means is that when Uber has too many drivers each driver has less orders to deliver and each driver makes less money or when Uber has too few orders and each driver has less orders to deliver and each driver makes less money.
It's just that Uber has messed up the ratio of the number of drivers compared to the the number of orders and the cause of this is because Uber charges more for the orders reducing the number of customers ordering from some markets and in other markets it has messed up because Uber just has too many drivers.
Tomayto = Tomahto (Tomato = Tomato) means that the outcome is the same even if the variables to get to the outcome are different.
Uber also has direct control of the orders. If Uber charges more less customers buy from them if they charge less more customers buy from them. The problem is that Uber's competitors are charging less and taking more market share from Uber.
Uber also has direct control over the number of drivers. Pay the drivers more you have more drivers. Think about it are you more likely to work if the boost is 0 or if it's 2.0? Uber has less customers so don't need drivers. Uber's plan is to have less and less customers? I don't know how that is going to work for them? The way Uber is run they don't want to be a rideshare company and they really don't want to be a food delivery company.
I'm also not sure where your from, but do a google search on american history slave trade and cotton trade in the United States in the early 1800's. What you will find is that Uber runs it's business like the american slave trade with how it controls the drivers and restaurants and it controls the customer the same way the cotton trade was done in the early 1800's
That's the funny thing about history. We learn about history so that we don't repeat the mistakes that have happened in the past and then we do them anyway.
Also not to leave out the restaurants. Uber does what is called fixed price and profit marketing. This is nothing new it. The modern version of this started back in the 1300's. The best example of this I can think of is Christopher Columbus discovery of America. If you look it up he was contracted where he could keep 10% or the riches plus some other things. The restaurants in the Uber model keep 65% + all the cost. It's the same thing.... Hundreds of years of the same thing....
The biggest problem Uber has is they are not competitive with the other companies that are taking market share from them. It's really the first thing you learn in business school on the first day you go there. If your not growing your shrinking. More customers means more growth. Less customers means your shrinking. In free markets it's the money you spend that controls what these companies do.
Take Tesla for example. When they have their robo taxi fleet it's is going to take business from every other player in the rideshare industry. It's bad because even if Uber sells out the company with their IPO. The people that invest before the price drop are the ones that will be hurt the most. It's going to happen anyway but what if Tesla delivers on robo taxi? What will the price drop be then?
Uber needs to do something to get more customers. They are the ones that buy the product and they are the ones that pay the bills. The only reason Uber would not go after getting more customers is Uber doesn't have the money to invest in getting more customers.