It doesn't take much to hijack a bank account and eventually you will regain access, but it isn't as simple as you might imagine and a fair amount of damage can be done in a short period of time.
Banks are known to irreversibly close accounts if they think you triggered some random algorithm, you have the same name as a terrorist, you have the wrong job, they don't like how you're using your account, or any other completely random reason. The decision is final they'll usually even refuse to tell you why they closed your accounts.
I had a bank (BMO Harris) close an account because the only transactions I had for about a year or so was "received directly deposited paycheck -> transfer entire amount to other bank account." At least they actually told me the reason.
I had to do two interviews with a bank to open an account in UK because their automated systems were giving them "errors", apparently, when they're trying to check me. Normal people have to complete an online form (5 minutes) and will receive everything through post.
A year later I had to phone paypal support four times as it wouldn't accept neither of my two cards. On my 4th try I finally managed to get an actual English guy to answer my phone, who finally managed to understand every word I was saying without having me to spell anything letter by letter..
Last week I wanted to buy a plane ticket. I had no problems doing that until now (I had an old laptop with windows 7). Now, since running Linux, I open the website, as soon as I click search to find a flight, suddenly captcha! Every 3-5 minutes a new captcha...
This is a nightmare!
Historically (in the U.S.) it was rooted in racism post-U.S. civil war. Now, less so. The history is still there, and the inability of poor people to obtain an account still exist. It excludes people from getting mortgages, loans, investing, etc. Cash App has become a digital bank for many of the unbanked. Before Cash App, decades ago, we had the U.S. Postal Service providing some banking services to Americans. (No, the USPS attempting to help Americans in this manner is not new, we've done it before)
Some know don't have a bank account because they simply don't trust banks. They want to have access to 100% of their money 100% of the time.
Some don't have a bank account because they don't have income (adult dependents)
One didn't have a bank account because she was a minor and there was no adult around willing or able to open one for her to use.
When I was a kid I knew of a few adults who had bank accounts closed on them for check kiting, including my parents - I know of this because I overheard people talking about it quite a lot. I don't know what ended up happening after that, if they were able to open a new account or what. I know you probably wouldn't be able to open a new account nowadays with Chexsystem and the like. Of course, check kiting also isn't a thing anymore either.
However if your in the US and having trouble with the banks I’d recommend looking for “millennial” banking which is usually zero fee, but you can’t write paper checks and they are remote only.
My wife was paying almost a thousand a month in fees at a regular bank, after I moved her to one of the millennial banks she really prospered. She can’t overdraw the account anymore - and it’s not really an issue since the bank is no longer taking half her paycheck.
There may be minimum balance requirements and/or fees but if you shop around a bit (look especially at local credit unions) they are not onerous and are almost certainly lower than what check-cashing services will charge. They do demand a bit more management and responsibility compared to a wad of cash in one's pocket, but that's the way life is.
Cause I've been denied by two banks, the third bank even had two countries blacklisted.. that's right, on their official website they wrote: "we are currently unable to accept government issued IDs from X and Y" or something along those lines.
The solution lay in busting bias and fixing immigration laws though, not banking.
I grew up in rural america and worked part-time alongside illegal immigrants, so yeah, it is true even if we're using anecdotal evidence. Your Walmart anecdote is an example of survivor bias.
Please point out where I said this.