Why do people STILL fail to follow basic containment protocols for containing communicable illnesses despite all that’s happened in recent years?

I just got over the worst of my second bout with CoVid. I contracted it despite being vaccinated and having already recovered from it once before.

It progressed the same as last time, but that’s not my complaint. My relative gave it to me who contacted it from someone attending my other relative’s funeral three states away. Lord knows how many people that one inconsiderate person infected. They don’t realize that they are only making their own lives harder. All they had to do was STAY HOME! Why is this concept so hard to grasp? Why? Even here in the West, it’s shameful.

Updates
2 mo
We have a lot of anit-vaxxers and anti-lockdown zealots in this thread. You guys need to chill out and pull your heads out of your political asses. You’re figuratively plugging your ears with shit. This is a common sense question that applies to colds, flus, or ANY illness. You’re perpetuating your own insecurities/conspiracies.
Why do people STILL fail to follow basic containment protocols for containing communicable illnesses despite all that’s happened in recent years?
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