To answer from a slightly different perspective, a business without solid foundations cannot provide continuity of income in any way and even if it is successful at first this success cannot last very long. For this reason, instead of focusing on the profit a business will provide the day after its establishment it is necessary to focus on the details about how it can provide a continuous return.
In short, it is very unlikely that a business established today will make a profit tomorrow and ensure its continuity. Focusing on the profit potential that the business can provide continuously rather than the daily income it will provide after its new establishment will help you achieve better results.
I see that many new restaurant businesses seem to be popular in several countries, every new restaurant business launched can attract many customers because the design is still fresh and unique, they also promote the restaurant on social media. However, I agree with your opinion regarding a new business, there is no guarantee of sustainable profits, the potential profit is up to the first 1-2 weeks because many people want to try the taste of food and drinks at your restaurant and customers will start to decrease in the following month, but we remain focused on business to achieve annual targets rather than uncertain daily income.