I think this is a horrible LPT. I think the better LPT would be "Don't be a dick and hand your kid an instrument with no resources or instruction." By doing the LPT, you're essentially setting them up for failure off the bat by handing them an out of tune guitar. Since they don't understand the basics, they likely won't understand that the reason all of their songs sound wrong is because their jackass of a parent intentionally tuned it wrong.
I got my first electric guitar when I was 10 or 11 after my parents made me prove that I actually wanted to learn.
I grew up with an Asian tiger mom prior to that who had put me in the Chinese After School Program where I learned violin and piano and hated it. My sister and I grew up listening to David Bowie, Joan Jett (She was actually my first concert), The Clash, and The Ramones and got into things like Blink 182, NOFX, Black Flag and the like as we grew up in the 90s.
During the summer when I was about 9, I asked my parents to get me a guitar, so I could play that instead. My dad had an old Yamaha classical acoustic guitar with the nylon strings and everything. It was way to big for my hands and definitely didn't have the tone for the music I wanted to play. I complained at first, and he told me that he'd buy me an electric guitar if I could learn 10 songs by the end of the summer. He later told me that he picked 10 as the number because he wanted to set a goal that would take me most likely months to get to, so he could make sure that I'd stick with it and not get bored or discouraged and quit.
He went out and bought me some guitar basics books from one of the music shops nearby, and I started studying every day. I ended up learning a slew of classical music from one of the basics of guitar books and then asked for one of the books that had just came out with all of Blink 182's songs from Enema of the State. I sat down and learned the entire book and then returned to my dad and asked for a guitar. He sat there and watched me play Fur Elise, Greensleeves, and then the entire Blink 182 album. He clapped, and we went to the guitar store where he bought me a used Stratocaster and a tiny shitty amp. I still have both of those, and I still play almost every day despite getting an early on-set of arthiritis now in my late 20s. I have a much nicer acoustic that I play on most of the time, but I still like playing some 90s punk on my Stratocaster that I decked out with the same humbuckers on Tom's guitar from Blink 182.