Its OK, I didn't find your comment rude, I just felt like I didn't understand. Mint is very easy and does tend to just work. It's a good choice, the only drawback really being that its kernel and some of its packages are not always the latest. But most people won't notice or care about that. I use Mint among other distros on some of my machines.
I agree with your reasoning: switch your own machine to Linux and get to know it. Leave your parents using what they find easiest, if they're not technically inclined. Pushing someone to use something because you think it's a good idea never works if they aren't enthusiastic too. You just end up receiving frustrated messages holding you responsible for every little thing the machine does that they don't like. Better not to insert yourself into the picture.