They say that there are two things in this world which are reliable: death and taxes. But there is a third, gravity.
If you are here at Bladeshow, hopefully you will not step off of one of the hotel's high balconies planning to just float in mid-air because you will not; gravity is 100% reliable and you will fall to your likely death.
Gravity never sleeps. It never fails. It constantly pulls down on everything... everything. And everything includes the blade on your knife.
Don't fight gravity because you can't win.
Tip-down carry uses gravity to keep the knife safely closed.
Tip-up carry fights gravity.
No matter how many precautions you take, how carefully you pocket the knife, how carefully you are to fully-close it, no matter what lock it has, you will -- sooner or later -- make a mistake and not get the knife fully-closed or locked, or maybe the knife's lock or spring will fail, or maybe the knife will move out of place in your pocket. Eventually one of these things will happen. And when it does, gravity will be there with 100% reliability to tug down on that blade and set up a serious hazard for your hand.
If you won't walk off of a high balcony, then why will you carry a knife tip-up?
Don't fight gravity because you can't win.