I wouldn't worry about the pressure points from the lift as long as you have the supports properly adjusted. No different than sitting on a trailer for 6+ months.
I understand lots of people store boats in the water, but there is no way I would keep my boat in the water without a lift. Heck, I get uneasy when we go on vacation and it is in the water for 6 days. Waves, wind, other boaters, lake scum, convenience all reasons to have a lift.