Aint that the truth.
If it was truly that simple it would be boring.
If you don't have good mechanics,just swinging the clubhead is not going to correct them.It might make you play a bit better because it will stop you swinging too hard and that's about it.
There is a reason why so many swing ideas and fads come and go.They don't last for most players and will never be a generic solution for all.
There are many alleged cancer "cures" claiming miracles that have surfaced over the years.Do you honestly believe that if any one of them truly worked for the majority that it would not have made headlines by now and become widespread mainstream?
Swinging the entire club at the target creates good mechanics. De Le Torre or Jones, I am sure, don't deny the existence of good mechanics. What they do challenge is how those mechanics are achieved.