I do care in some instances.
If an individual chooses to part with their money, it is 9/10 none of my business. However, in this case, parting of the money involves a seller providing a product that does not live to its advertising claims. As such, other entities can ( and will ) take note of this sudden change in customer's attitudes towards blatant lies. Note how much damage Tesla did to cars with cars as subscription. Other manufacturers were quick to pick up on this.
When I buy a car, I want some level of assurance that it is not just 'beta', 'alpha', but a fully working product. I don't accept this software mentality 'we will ship it in next update' in cars. So in this case, stupid customer moves affect me. So I can do two things. It seems easier to enforce current regulations on Tesla and quietly calm down defensive Tesla buyers, who will defend FSD with their lives if they have to.
That's really my problem. You get used with it and start trusting it until it unexpectedly goes straight into that white van.
In the end, who knows? Who cares? If a customer says they are happy with the purchase, why should someone else tell them they are plain wrong? I can disagree, of course, but I should not tell them they're just wrong for being happy.
I don't tell people they're wrong for paying extra for a special paint color.