Their Loss
I have a dumb relative who always thinks she knows better. Years ago she wanted me to help her with some sort of device that lets her call long distance without paying for long-distance on landline using the internet. But the problem is she had a dial-up connection, which is super slow. I tried explaining to her several times how she would have to upgrade her internet first for anything to be effective.
But she kept saying she heard this product will fix all of that and insisted on buying it. I even told her what will happen, which is, it’s probably a scam and they’ll give some useless part like a router and you would have wasted your time and mine, and money. She didn’t listen and went through because she always thinks she’s smart.
Well, a few weeks go by and she gets the device and of course, it’s just a random router when she wants me to install it. Everything I said to her earlier comes true. She just ignores what I say and moves on to something else that will work better. Rinse and repeat. This is how dumb people usually are in my experience. They think they know better than you.
When things don’t go according to plan, they either make an excuse and it’s never their fault, and/or move on to another thing with the same stupid thinking.