I suppose there is the issue that these athletes are role models for a huge amount of children and teenagers across both developing and developed countries and realising their heroes are doping is not a good mindset for children and teenagers to get into (doping = success). We don't know the long term health effects of these medications. In terms of mismanagement, different countries have completely different anti-doping organisations and levels of testing which is a completely unfair unlevel playing field. Obviously Russia was banned as an entire country from global championships which hasn't happened before in recent memory/as far as I can remember so that's a huge step. Kenya were also nearly banned. There are also issues - I think - with athletes transferring country. It's fine if they legitimately MOVE there to live there permanently or at least for a number of years, but anything less than that shouldn't be accepted as OK.
People should care about it because running is one of the most basic forms of movement, one of the most pure and simple accessible sports worldwide, you don't need much equipment, and has the potential to change lives. For example in parts of Kenya winning a series of road races can set you up for life and change not only your life but the lives of your family. Also track and field has so many different facets - sprinting, middle distance, long distance, jumps, throws. So there is something for everyone and its in everyones interest to have a clean fair sport that does not damage peoples health.