I'm not a vehicle lifting, hydro pressing cowboy by any means. At least not all the time.
So I would suggest you two are taking my comments to an extreme.
And if safety is key then I would also say a scissor jack should be very low on the vehicle jacking equipment list. Probably right next to a HiLift. But the versatility of a HiLift makes up in leaps and bounds over its general safety.
Well maybe, but if you go back and read, your statement was kinda derogatory and nothing short of definitive, so, I'm just pushing back on that since my experience doesn't comport.
I would also say, the jack failures are an engineering problem. Kinda like when someone tells me a solid axle is better and stronger and more reliable than IFS. In which case I'll say, "Sooo, a dodge dakota dana 30 is better than the IFS in my 100lc" ... of course not, but what happens when a statement is oversimplified to that extreme, is it becomes a lie, and is completely misleading to the unaware. These jacks, maybe next time lend them yours instead of watching them risk their lives.
3-4 times a year we're moving 20-50000lb gensets on roofs or around high power lines or whatnot. I'm damn certain my guys can do this in their sleep, but protocol, paperwork, pic plans, hot work forms, and equipment checks that take a few days for a 15 minute move are always completed as if its the first time for everyone, and STILL stupid shit can happen. I watched a subcontract versalift operator leave the steel plate with one wheel holding 35000 pounds, that was not permitted by law to touch the ground, or I'd have to have the tank re certified as leak free. He wanted to just touch down and back up, but the asphalt had compressed, so at my expense I stopped the lift, cribbed the entire load, called in a crane, and re situated everything to the start point of the plan. Is that extreme for changing a tire... YES to the point of hyperbole... but, at its core is the same respect for what you're doing and the forces involved. Humans are nothing more than water balloons waiting to be popped. It doesn't take much, just a few lbs of force on a hard object against you, and you're dead. One of my goals in life, is to not die of something preventable.
I've often thought of removing the high lift from my truck. Honestly, on a job site, that thing would get thrown out. If I saw a sub with one, I'd lock and tag it. 100% liability. Outside of training on one to use it for lifting and tugging, I've almost always found a way to bypass it. I used one once. The proximity of you to the force is terrible, the weight being cantilevered always introduces force on the x axis, the mechanisms on well maintained ones still fail and jam more than anything else. its 40lbs and unwieldly. It's the old wives tale of vehicle recovery that we've heard we must have, but we don't know why.