Sounds great, but in practice people will take advantage of you; e.g., if you walk alone in the street at night in a big city and a stranger asks to use your mobile phone, you'd have to be particularly naive to say yes.
Look at my post: I only say you should treat people with kindness. You are saying some nonsense about "applying as much kindness as possible." Is it a habit you have of putting words into another's mouth. This is a Strawman, either intentional or unintentional. It's generally possible to be kind while also protecting yourself. It's only in very extreme circumstances where it's not. Calm, speaking interactions generally do not fall into this category.