You’re not unreasonable, but they’re not fixed points either.
i used to live paycheck to paycheck. Always owed money on my credit card etc.
but, mid 20s, I learnt to budget. Opened a lot more bank accounts than the average person and put regular amounts in each after each pay. I had a rent/mortgage account, bills acct, new car savings, insurance, holiday etc.
Each pay might have been 50 in the car, 100 in bills, 30 in insurance etc. I made sure I paid off the credit card every month so I wouldn’t pay any interest. I never pay a bill late because I hate paying any extra unnecessary fees or charges. If I need to pay a bill and there’s a discount date, I’ll juggle everything to get it paid by the discount date.
I also had a ‘just in case’ account. I used to put $10 a week in there. Then $20 a week, then $30. Not because I thought I’d really need it, but over the years as my wage increased, I increased the amount.
In the end it grew to a decent sum and I used it for an investment to benefit our whole family.
So yes, I do think people have a tendency towards one or the other, but you can learn and make changes too. It’s even easier these days as there is a lot more information online about how to save an invest, even starting with really small amounts.