Packers signed someone to 3 years, who discloses shoulder pain every week. They tell him to play through it, as it is manageable and it becomes worse. The team falls apart, separately. During the process, Bennett is being pumped with anti-inflammatories, at the same time, a running record (apparently documented as well) is being established that his arm is getting worse. Because the team doctor doesn't really acknowledge the severity of his injury and how it's getting worse, he's becoming skeptical. This is exacerbated when he takes the bye week to get the medicine out of his system. He hasn't missed one game to this point.
Subsequently, after getting different opinions, three other doctors say that surgery is immenint - key word. He's on a sinking ship that has pushed him through a worsening injury.
Instead he options to take the surgery, an investment in the last two years of his contract - he wants to be effective long term. They take it as a ride to IR, free money and next year being a retirement for him, based on a tweet.
Unfortunately, we cannot assume any context of this tweet - how serious it was, how much arguing had been done to this point, etc., but the Packers do not enjoy this string of actions.
So the Packers send him shipping. The Patriots, a former team that he enjoyed playing for, doctors for the team whom he trusts, claims him. He's cleared, but it's still obvious - surgery is imminent. The better environment makes him more dedicated. The staff, with which he holds more trust, makes him feel comfortable - probably assures him that he'll need work on it soon - and he decides to play.
I dunno man, I had to type all that out to process it. Bennett probably shouldn't have made that tweet - that being said - if what Bennett is saying has truth to it, I'm assuming the Packers Dr. didn't outright force him to play, but possibly didn't acknowledge the worsening injury as much as he should. When it was too late, they say he's failed to disclose an injury after he decides for surgery. Had Bennett had a better, more honest communication path from the doctor, I'm sure this would have played out a bit differently.
I just wasted a bunch of time but whatever, welcome Bennett, you're one of my favorite NFL players.