Of all the dozens of times I have heard doctors talk about injuries, I have never heard them say that an otherwise healthy player, like Watson, was injured in a non contact drill because his tendons were weakened by normal wear and tear, and then it was almost inevitable that it was going to tear. I have heard them say that with partial tears then full tears are more likely, which seems almost obvious.
I do believe players are bigger and strong and likely put bigger stress on these soft tissues. But it doesn't seem like they are expected more now on non contact drills. Doctors would be talking about that all the time.