Because you and your generation use smartphones and google all the time! My generation (40+) socialized with books and analog searching in books, so we can remember passwords and phone numbers easyly than generation y and z. I remember all my passports and about 50-60 phone numbers, because I use them daily-weekly. Modern teens not seen phone numbers, not dial phone numbers, only use avatars or pictures for dialing. This is the difference and this is the advantage of the 40+ years old generation.
my personal tips for passwords
1. choose a phrase which easier 2 remember
for example coffee
2. change some letter with number and sign
not need 2 change everything just 2 letter is enough
for example c*ffe3
3. add site name behind your phrase
for example for fb password your password becomes c*fe3fb
for twitter your password become c*ffe3twitter and so on
4. now you had different password for different site
and you will never forget it
Zaini Asma
Robbie Dyches
Eun Hee Lee
Lorraine Moser Baron
Lady-Lynda Leigh McKie
Abdul Rashaccount
Jody Carney
Andy Kovesdy
Tina Hernandez