The issue isn't the inability to send checks. Many Americans can't get bank accounts to deposit checks into.
A few years after I managed to get them to give me an account, I overdrafted my checking account by a few dollars and they disabled my ATM card. After my next deposit cleared, I went back to that bank branch to get my card reinstated. They did not want to do it. The manager eventually said he could help me if I "promised I wouldn't do it again". I asked for my account to be closed instead, and I will always remember how pleased the guy seemed to be losing me as a customer.
It is not easy for everyone to get and maintain a bank account.