Nearly all new hospitalizations now are coming from the unvaccinated folks. Look if you had COVID recently, you probably have some level of antibodies built up but there are varying reports of those disappearing anywhere from 6-12 months. You'll still have some T Cell receptors that still have a memory of the virus but its unclear how much that will protect you from fatal symptoms.
Given we know there are clearly harmful short term effects (fatigue, chills, loss of taste and smell) and harmful long term effects (damage to the lungs, heart, kidneys and other organs), it would seem silly to risk getting it again instead of a vaccine that's been administered to over 100 Million globally with almost no short term side effects and extremely unlikely likelihood of long term effects given the history of past SARS vaccines.
Some concerts, countries you travel to, large gatherings, etc. may require proof of vaccination too in which case you're only creating a massive inconvenience for yourself.
Just get the Pfizer double shots and you'll be good to go since the Moderna 2nd shot has been hard hitting for some.