Corrective exercises are largely a waste and can burn huge amounts of energy/time for very little reward. Particularly in novice level athletes.
Even in the case of injury recovery merely de-loading with barbell work is a much better choice in most cases. If you look at
Barbell Prescription by Sullivan, you will notice that they train novice geriatrics without corrective exercises from day one.
https://www.amazon.com/Barbell-Prescrip ... escriptionIn the case of intermediate, and that rare individual the advanced strength, athletes some value to assistance exercises can be found to address an individual weakness. But even then, most intermediates would be better served by just getting stronger at the primary compound lifts.
Even advanced athletes in most non-strength sports do not need anything beyond intermediate barbell programming as they simply never get that strong and the barbell is being used as an aid to their sport as it is not a primary focus of their sport.
And the primary author of the written articles is simply wrong on single leg training. While useful for some flexibility based issues, 99% of the population is better off getting stronger at a barbell back squat. The injury risks are just too high with single leg work once it gets heavy enough to matter due to issues with balancing a load. I have done some single leg work as a warmup and when in an area where I didn't have access to a proper gym just for the sake of variety. But...if the old school split jerk and snatch guys competing at the Olympics didn't do it, it is certainly a waste for anyone performing at the amateur level.