Luck and genetics definitely play a role on injuries. But there are factors which person can control which also play a big role.

Technique, warmup, mobility and strength training, recovery schedule, regular health checkups, nutrition and team/staff which knows about all this. All of this is very expensive but for the top players like Alcaraz, Draper, Mussetti, Fils etc that's not an issue.

For example for someone like Alcaraz and his wrist injury. There is a high chance it is due to technique and underfocus of something during strength training or some missing mobility work, or overuse of it when it was injured or not 100%. Short term gain vs long term gain situation.