you just can’t read well

Damn, why make it personal? I think you might be right, but the post is open to multiple interpretation.

The person says they’re vaccinated, but they won’t go to Trader Joe’s because there might be unvaccinated people there. Then they say:

Because you can still catch it, and risk is low but you could spread it to someone unable to vaccinated. Because I care about people other than myself.

People are so selfish and short sighted, covid has really taught me how many people only care about themselves.

I think it’s fair to interpret this as “I don’t go to TJ’a despite being vaccinated because I care about other people,” and then the next paragraph is negatively comparing other vaccinated people to themself.