A lot of old people have figured out that you can get other people do do stuff for you by pretending you don't understand it yourself.
I don’t think I could help somebody set up modern Windows. If I help someone with a computer, I’m telling them I’ve got it into a reasonably usable and safe state. With all the spyware built into a modern Windows system, I don’t think I could be confident there.
I agree with your point though, and I've tried explaining that to them; if something is broken on your Linux box I can get you to send me a tmate URL and I can likely fix any problem you have quickly just because I am much more used to it. At some point I probably should try doing the ultimatum.
While the parent comment indicates that a child is possibly overstepping, your comment is a greater overstep.
I mean this is basically the ultimatum idea, but presenting it as an unavoidable limitation rather than an arbitrary unwillingness to help.
Your parents are adults, they can make their own decisions and deal with the outcomes.