I’m sure this won’t be a popular post here, but I’ve thought about the exact same thing. It’s hard to imagine any of this is good; but, it’s dumb to not consider all possibilities.

Upvoted because your post's title (Brain spasm) made me laugh.

Good question about COVID and possible immunity to AIDS. I suspect the answer is "no" but haven't seen any data yet.

There IS data now on other health issues (in this case) caused by COVID:

https://www.taiwannews.com.tw/en/news/4438515 (Bold added below):

Long after recovery from COVID-19, people face significantly higher risks for new heart problems, a large study has found.

Researchers at the U.S. Department of Veterans Affairs compared rates of new cardiovascular problems in 153,760 individuals infected with the coronavirus before vaccines were available, 5.6 million people who did not catch the virus, and another 5.9 million people whose data was collected before the pandemic. An average of one year after their recovery from the acute phase of the infection, the COVID-19 survivors had a 63% higher risk for heart attack, a 69% higher risk for problematic irregular heart rhythm, a 52% higher risk of stroke, a 72% higher risk of heart failure, and a nearly three times higher risk of a potentially fatal blood clot in the lungs compared with the other two groups, according to a report published on Monday in Nature Medicine. The elevated risks among former COVID-19 patients were evident in young and old, Blacks and whites, males and females, people with and without diabetes and with and without kidney disease, as well as smokers and nonsmokers, said Ziyad Al-Aly of the VA St. Louis Health Care System and Washington University in St. Louis.

The risks were high even in people who had mild COVID-19 and did not need to be hospitalized for it, he noted in a Twitter thread. "It really spared no one," Al-Aly told Reuters. "People with COVID-19 should pay attention to their health and seek medical care if they experience symptoms like chest pain, chest pressure, palpitation, swelling in the legs, etc."

EDIT: Here's another paragraph, in this case regarding controlling for vaccination status (again, Bold added):

Our analyses censoring participants at time of vaccination and controlling for vaccination as a time-varying covariate show that the increased risk of myocarditis and pericarditis reported in this study is significant in people who were not vaccinated and is evident regardless of vaccination status.

Another EDIT: Caveat -- I'd be cautious of this study until the results are confirmed by other studies; it's not beyond possibility that the data here are manipulated to make it appear that COVID itself is actually responsible for the horrible side-effects we're seeing from the vaccines. No disrespect meant to the researchers in this case, but it HAS been shown in recent years that numerous studies are untrustworthy.

Who knows.