Ignoring contexts of poorly grown plants, methods don't really impact yield or quality much... that's all limited by genetics. There's some empircal evidence to support that, too. Studies testing impact on yield typically show thc % isn't correlated to that loss in yield. Not an absolute, but certainly pointing in that direction in a meaningful way.
KISS principle is best for the most part. Keep it simple, stupid. Save the money. Save the wasted effort chasing smoke and mirrors.
Direct to substrate is simpler with same or better rates of success, and certainly less effort. No risk of fiddling with a taproot just to see germination occur.
Soilless growing method - Has a shorter learning curve and good processes can be repeated with consistency through basic instruction. e.g. Anyone could take what i do and have nearly the exact same results in their garden. You control nutrition levels around roots. Basic watering habits prevent buildup. Therefore, diagnosing problems is easier and the fixes are easy to implement, immediately. Plus, if you have a good formula, it works "perfectly" (life is always a little messy) for 95% of plants and well enough on the other 5%, too.
Consistency seems the be the most obvious thing we influence through our methods more so than affecting yield or quality of outcome. Consistent germination time expectations, consistent yields relative to plant size and vege phase length etc etc... Easier to plan and manage a grow...