With LH replacing your wheel, wow...that's a good airline. Maybe it's because they are a large company sponsored and supported by the government that operate in a very consumer-centric culture? Or because the laws in Germany or different?
I had AC replace a damaged wheel for my suitcase a couple of times.^
Last year, AC damaged a rivet of my Rimowa case. I showed them. Their answer was, well, this is an expensive suitcase. It would cost them a lot to fix it if they use their baggage repair agent. He suggested me to take it to Rimowa and have it fixed and he would pay for my expenses. Rimowa fixed it for free and I just charged them the shipping.^ So yes, AC did intend to fix even a small rivet damage.