Again, you don't understand economics and the scale.

First of all, a billion of profit in a year won't sit under the mattress. It will be used for investments into business or to pay dividends to shareholders. Thus the end balance in the bank account will be zero. That means if you have a billion loss next year, you can't operate your business year after as you don't have enough money. You will either shrink your operations and fire people or go bankrupt.

That also means that if you've invested in your business, next year your expenses are 1B higher, so now you need to earn more money to cover that.

Second, it doesn't matter if your profit is 1k, 1m or 1b. If it's 4% then it's 4% either way. It's basic school math.