Keeping a close eye on your balance is basic financial responsibility and maintaining situational awareness against the ever looming threat of fraud. It doesn't matter if you operate on a bank account with $10 or $100,000...if you're not actively accounting for your transactions, that's a personal flaw. The way how I see it: if you don't have the discipline to properly account for even the smallest expenses, you'll never be able to sustain wealth at any significant level.
Anecdotally, a recurring pet peeve encountered is when I'm not provided with a receipt for purchases by default. This happens more often than not at fast food joints and gas stations, and when kindly asked for one, I almost always receive a reaction of either dubious entitlement or disgusted inconvenience, highly correlated to which car I happened to take that day. Although this class of expense is in the noise with respect to my financial posture, I still track them with unwaivering vigilance and find it so ironic when a minimum wage cashier who probably struggles to make ends meet every week disrespects that little piece of paper which enables personal accountability. Stochastically speaking, many of us--including myself--come from humble beginnings.