The short answer is that LastPass does not get your passwords (not exactly). All that is sent to them is your encrypted stuff.
Then I learned something. In one hour. I was lead down the simple path of well presented information to the knowledge that reset the way I look at everything. I’ve recently “let my weight drop” and put it on that downward slope. What a crazy sentence. It seems to imply I have control over the angle of the slope. I do. Today for instance I woke up to a 175 LB me. Nice!