I know someone like this.
He’s so burned out from doing it as a full time job he can’t be bothered to set up his own system, much less everyone else’s. (He sometimes helps me with stuff, with the understanding that he will answer questions and that’s about it after it’s been set up)
Maybe if he were to charge for the service and labor and quit his regular job, and just do nothing but troubleshooting all day (frustrating and tiring in its own way). But assuming people were into that (which they typically aren’t, especially not enough to pay for it, which is part of the frustration), being security focused and enjoying that stuff for yourself becomes a lot of work very very quickly when you do it for others.