I do not think most of people start seriously thinking about making savings or become capable of it until they hit 35 years of age.
Well that's just poor life choices then. I opened a savings account when I got my first real job when I was 17. By 25 I had saved up over $50k which covered the down payment on my house.
That’s an extraordinarily arrogant claim. Not everyone has the ability to earn enough money to save, never mind that much. Many Americans who work full time don’t even earn enough money to pay for rent and basic expenses, never mind luxuries or savings.
Given that you talk about it in the past tense, I assume you’re a bit older than 25 now. So am I (42 now). Back when I was living in Maryland (the whole 2000s), minimum wage was $7.25/h. At 40h/week, that’s $1160/month. Even back then, a decidedly non-luxurious 1br apartment was $700, far above the 30% of income one is supposed to spend on housing.
Not everyone is capable of earning more than minimum wage, be it due to their innate abilities, or because they didn’t have the opportunities to study. You don’t know what someone’s circumstances are. The people I know who were able to save lots of money when young were people who could live at home rent-free. Not everyone has that option, either.