Gathering some thoughts on this subject below.
I disagree to a certain extent when I hear everyone talking about the joy of running. Not everyone has to run for the joy of running. Not everyone feels bad about pushing themselves and getting injured. I have run for the joy of running, I have run for pushing myself to goals which seemed unachievable. I don’t call them joy of running. They are simply my targets.
Such people may be a minority in the runners community. But let’s accept them for what they are. I carry my injuries with pride. They were my teachers. I learnt from them. Secretly, I enjoyed those injuries. That’s just what I am. And I love it.