There are other nations who aren't scared of doping or other questionable methods (NOP in athletics, Larry Nassar sex abuse in gymnastics, jiffy bags in British cycling and so on). This is a problem with winter sports in Germany in general, other than luge & bobsleigh just about every other winter sport is in a slump lately. Biathlon, cross country skiing, ski jumping, nordic combined has also seen better days especially that #1 guy isn't German anymore. Speed skating just fits the trend.