I agree and I hold myself to these standards every day. The problem is, there's a lot of assholes who will exploit other people's kindness. Like the greedy restaurant owner expecting you to tip his waiters because he's not paying them a living wage. Or the reckless idiot expecting others to let him into their lane and not paying attention to the road, resulting in an accident in which innocent people get hurt.
Be kind but also stay on your guard so that arseholes can't exploit you.
Be kind but also stay on your guard so that arseholes can't exploit you.