I hope that the techs give an extra tug on the wrench "just to be sure" when they are tightening those two bolts back on like I do when putting the lug nuts back on my car wheel...
This is a common misconception. Once you hit the rated torque you NEVER do an "extra click" or anything else. That increases the applied torque beyond rated, and can (has) had disastrous consequences by weakening the bolts and/or the material the bolts are seated against.
Source: career Naval Aviation Maintainer, QA on F/A-18's and H-60's, etc.
We do 600+ foot-pounds by hand on H-60's. It's not fun but it doesn't require a hydraulic jig. It requires a specific (long) wrench and a guy who can brace. If you can deadlift 200lbs you could do it.
The jig is likely to speed up the process and prevent fatigue; doing that torque 16 times per wing would get exhausting.
"Easily" by the way does not mean clip one in in 5 minutes :)
These things need like 15 hours of maintenance for every flight hour (and this is regular flying with no parts coming off)
I have no experience with military planes but I think in this case "easily" means more like "possible in a few months of work". I suppose when an airframe costs hundreds of millions it takes a lot to make it a write-off.
The wings on an F-16 for example are secured by two bolts all you need is to disconnect the avionics remove the bolts and the wing comes off.
You can replace a wing on an F-16 within under half an hour without skipping any steps it is like changing tires on a car.