The vaccine imho is very beneficial. With it, you won't die or be absolutely trashed by the disease. The same applies to the flu vaccine. They reduce the severity of the virus so you don't get totally crippled by it. Learn more about vaccines here.
Storytime:
I got an extremely severe strain covid in Feb 2020 and no proper vaccines, 'treatments' or widespread testing existed. It lasted for two weeks and I could barely function and was in severe pain. A few doctor's visits later and I find out lungs are likely to be permanently affected so doing daily activities is a struggle at times along with experiencing pain when I breathe at times. My parents got covid this year (mid-2021), but had at least one dose of the vaccine and had mild symptoms and I did not get it a second time but was fully vaccinated (possibly by chance I did not get covid). I've also contracted the flu before, but I was vaccinated so I was sick for like 1-2 days and was back on my feet. A family member didn't get the flu vaccine and was sick for a much longer time.
So, clearly, the vaccine doesn't "cure" the disease but instead, makes the effects lesser so you're not trashed by the virus or disease and recover quicker. That's what people don't seem to understand about it.