Statistically, natural immunity is not better with covid as the survey shows. You are free to post contradictory scientific evidence but you will not find any.
Generally, I agree that we should let our bodies handle it but not in this case. There is a big difference between a healthy immune system and an unhealthy one and with this pandemic, the consideration cannot be simply what works best for me personally.
Those who refuse to take the vaccine are killing others by their irresponsibility since they are five times more likely to contract the virus than vaccinated people. Also since they are taking ten times more hospital beds they are also contributing to higher general strain on the hospital system which in some cases of extreme overcapacity can also result in death.
A 1 % death rate in a population the size of the USA is 3.3 million people. That is about three times more dead people than in all the wars the USA has ever fought and to any sane person is not an acceptable casuality rate.
Flu is not so contagious and its death rate is only 0.1% so one-tenth of covid.
EDIT:
Add extra link about the Natural immunity discussion:
Reduced Risk of Reinfection with SARS-CoV-2 After COVID-19...
Please note Israeli and Cleveland studies not been peer reviewed.