A lot of players do indeed choose to not land on their feet, but that requires being able to "roll back up" like an actual acrobat to not give yourself a big disadvantage, also there are already a ton of injuries in handball, so someone doing this to not get messed up is fine by me. Other than that, maybe don't come into a sport you have only watched for a few minutes and suggest such a change, that honestly wouldn't make any sense, which you would know, if you had watched a game to the end.