A little too trusting believing that, no? Hairdressers are famous for cheating on their taxes, and cash is an excellent way to do it.
https://www.sverigesradio.se/artikel/hairdressers-evading-ta...
"An ongoing audit of the hairdressing industry that the Swedish Tax Agency is currently conducting shows that virtually all hairdressing companies audited by the authority are involved in some form of tax evasion [...] The most common tax avoidance discovered in the audits of around fifty hairdressing companies so far is undeclared income"
Banks in the US will charge you additional monthly fees for cash handling if you deposit a lot of cash (don’t quote me, but I’m quite sure of > ~5k/d threshold).
I never has a fee for any bank for depositing cash, even up to a few thousand. I really doubt that will happen unless you walk in with millions. In that case you will have more to worry about that fees.
I don't miss cash at all, and in many ways I will be happy if I never have to carry it on me again.