But the problem often is (and it seems its valid for you too) that people are extremely focused on the sport(s) of their preference, but completely ignore overall health, ie by working out muscles and stabilizing system not primarily used in their sports. Ie not many runners ever hit the free weights or machines so their upper body looks like from Auschwitz, and it would benefit them massively long term - joints last longer, overall connection with the body is stronger. Not many runners do dedicated exercises to make their knees and ankles stronger. And so on.

I mean tendons and ligaments and rest of connective tissues also require focus when training, I'd say even more since it takes significantly longer to build any stamina/strength into it (so usually when starting working out muscles develop fast with connective tissues lagging behind and then folks end up with injuries since you need it all working together perfectly under serious load).

Walking back is severely impractical in real life and in outdoors outright dangerous if alone, so there may be smarter ways to reach same result. But it requires a bit of thinking, dedication and discipline. Just like rest of our lives.

Some exercise routines are better than others. If you want to get stronger overall, you probably want to do something like PPL. If you want to have a more robust and athletic lower body, the exercises recommended by the knees over toes guy are probably what you want. He didn't invent them (although I think he actually did play a role in making the tib bar a piece of equipment you can easily find and buy), but he's done a better job than anyone else I've seen of synthesizing it all.