It takes maybe 15 minutes to remove the bumper and 3 cab mounts, it isn't any trouble at all, and never had an issue with lifting the cab on a truck, as I replace the body mounts on every truck I restore, the last one was 30yrs old...
To each his own… as I said whatever works for you.
Taking the time to liquid wrench soak those bolts to get them loose, and then maybe having to replace the cab mounting bushings or bolts unnecessarily seems ridiculous.
In my experience having pulled a 5-speed Toyota tranny about 4 times….
Once I have the drive shafts off, the transmission/t-case on the tranny jack, the cross member off, the exhaust pipe off, I lower the tranny about 4 or 5 iches, with the back of the engine supported, I can remove the 6 bolts from the bell housing and pull the tranny from the engine in 10 minutes with my air impact and my ˝ drive extensions. There is no frustration and no problem with space. But someone who has done this more times than I have may do it quicker.
It goes back the same way… no space problems getting the ˝ extensions up to the top bell housing bolts.
That's just my opinion - it may be worthless.
Gnarls.