Your friend circle in Germany probably doesn't have many members who were a proud big boned 5"7' 300lbs (~140kg).
In my (obviously anecdotal) experience, that’s not who the primary GLP1 user is.
It’s the suburban mom (or dad sometimes) who wants help losing a little weight. Instead of being 300lbs like your example, she’s 160lbs and wants to be 140lbs.
For good reason.
That'd be a BMI of 47. There isn't a lot of statistical data for such high BMIs, but [1] lists prevalence of BMI>40. In Germany 1.2% of men and 2.8% of women had a BMI over 40 in 2011, in the US it was 5.6% and 9.7% respectively in 2016. That's nearly four times as many as in Germany.
1: https://pmc.ncbi.nlm.nih.gov/articles/PMC7078951/