Definetely naieve.
Unless he's some sort of savant.
But he's 19, and his head swimming with dreams of making it as a pro-photog.
Odds of become a recognized photog (not a Tuber claiming to be a pro photog) are about the same as a college football player making it to the NFL.
The answer is Yes.
I've been to South Rim four times in my life. Always found 24mm wide enough.
I once brought 14 and 17mms and fonud them too wide.
Though for astro the 14 is ideal -- I just always had bad luck with the weather.
24-70 is perfect for the lookouts.
Congratulations. Your comment just likely sparked a new Tik Tok trend the world doesn't need.
I have used mpix and found them reliable.
I prefer to do my own though, when I do print, which is rare.