Why older people talk about the MZ generation

(1)Kim A-young X Generation Gangnam-gu
(2)”Oh, people who are leading the trend like us these days.”
(3)- If I use the word “young things” these days, I’m old
(4)- If I use the word MZ, I become Generation X
(5)- I’m still young because Generation X is a word that symbolizes youth
(6)because of the miraculous triad argument