If ever there was a body NOT made for tennis, it's Andreescu's.
It's never a matter of IF she'll be injured again - it's always just a matter of WHEN she'll be injured again. And that takes a toll not only physically, but psychologically, as well - with this high number and high frequency of injuries - all of which have the common denominator of playing tennis -, how can she possibly trust her body?
There are a few things in life that are so predictable that you can set your watch to them: the sun will rise, the sun will set, a mass killing will occur in the U.S., and Bianca will injure herself.
If performing a particular task results in frequent significant injury, there comes a point where we'll stop doing it, no?
Given that she has a history of frequent injuries going back bout a decade, I imagine that she has done all of the stretching, conditioning, strengthening, and other exercizes that she's willing to do in order to get her body to the point where it doesn't break down. But the injuries continue. So, either she is not willing to 'train' enough to make her body significantly more resilient to tennis-related injuries, or, if she has 'trained' significantly toward avoiding injury, her body is simply not made to withstand the physical demands of playing tennis.
I see no other possibility.