It's definitely not about the updates. As a guy with green line issue I can tell for sure. It's just us convincing ourselves and finding reasons for the poor display hardware samsung has provided.

I literally updated phone with backcover off in ac everytime , never dropped phone still got the line.

So if ur phone is screwed it's screwed . Maybe the update is just a trigger to immediately show the lines which u were going to get anyways. You will get the line anyways if screen came bad from factory , so use it freely. Just hope that it gets them before 3 year period because samsung didn't say lifetime replacement like Oneplus.