That's ridiculous. The flooding in Mallorca has nothing to do with it, he won it because:
"Fellow players voted Nadal as the winner of the Stefan Edberg Sportsmanship Award for a second time, recognising the Spaniard for his fair play, professionalism and integrity on and off the court. Nadal also received this honour in 2010. This season, the 32-year-old Spaniard spent 36 weeks atop the ATP Rankings and won five titles, including record 11th titles at Roland Garros, Monte-Carlo and Barcelona. Off the court, Nadal supported flood relief efforts in Mallorca."
https://rafaelnadalfans.com/2018/11/09/rafael-nadal-wins-sportsmanship-award/
Fed is no GOAT either.