We are all products of our environment. Some landlords have been made heartless by some tennats that exploited them previously hence a blanket no noncense attitude to every tenant. You will treat some people with kindness and respect and they mistake it for you bsing soft. Before you know it a tenant has made paying you rent not a priority because of their assumption of you being "nice". This is what makes some landlords generally very bitter people. This applies to every business dealing, once people perceive you as harmless they will drag you down to poverty.