Yes, if you are pushing on an attic hatch with a Telestep ladder it will bend and break if it is sealed. Do what Jerry said. This is how I have done it for years and years and have never had a problem.
Now with that said! If a hatch is so stuck that it does not open easily without damage to it and or you, then it has a problem. Look at it like a window. Do you force a window open? I hope not! Well, if you do you will stop once you pull one apart!
