Actually never understood the "work, work, work" stereotype. Working in Germany is usually 40h a week, 29 days of paid vacation on avg and parental leave. That's hella chill compared to most European countries, let alone the US, South Korea, Japan etc where you basically work yourself into crippling depressions. German work ethic is only about gaining max results with as little effort. In IT where I work noone works hard, everyone basically wrote some little automization tool or program that works for them and we'd just do adjustments.
Besides Bayern is doing 3 training sessions a day, maybe an extra nightshift in the gym and strict diets. That's pretty much the case in any club in Europe that aims for a high level, they were probably even heavier at Madrid.