But did you find all the secret doors?
And you have to stand around for ages waiting for some traps to show.
And the potion only adds 25 points to Lockpick. You must have wasted a LOT of time, even with the Thief belt, saving before opening a lock, getting 'Failed, failed, failed, lock too complex' and having to reload and try again. And even so there will have been some you couldn't open, even with a high LUCK stat.
Been there. Done that.