Well then we should improve our scouting department.
Also, we've had plenty of success stories too. Buffon and Bonucci (first time) were both signed at a very young age, so were Chiellini and Dybala.
Besides, every single club has flops. We all know that not every young player works out, but that doesn't mean that you should change your strategy. Bayern didn't suddenly stop buying young players after Renato Sanches.
I was being sarcastic, but we do have to buy the right players. Because this shirt is heavy and everyone targets players wearing it, so those with soft or unprofessional mentalities are destined to fail.
Paratici in that interview with Tek was talking about how this is really what scouting departments look like now. Everyone knows everything about the technical abilities of players, there are stats on everything, but they want to know the personality and the human behind it. Yet still there are failures again and again.
I think Bayern have the perfect set up of any team in the world tbh, they are in a comparatively strong league but are so much bigger, storied and wealthier than the rest. Their history for the last 25 years is swatting off the latest upstart team to dare challenge them for a season or so. Dortmund, Stuttgart, Bremen, Wolfsburg, whoever. Usually one of those teams wins because Bayern are transitioning or it's a spectacular failure of a season with the wrong coaching choice.
Juve in many of the last years have been in a similar position, but we worked ourselves into that position from mediocrity, building the club on and off the pitch with good choices. In Serie A things can easier change hands than they can in Germany, even if you only look at the history and potential of Inter and Milan, not even mentioning the chasing pack seasonal/era wonders like Napoli or Atalanta. If we make bad choices we can easily slip off our pedestal for some time.