If anyone needed further proof that the good doctor has lost all semblance of relevancy, look no further.
If you can dodge a wrench, you can dodge a ball.
If a 'drill' has a scoring system, it isn't a drill, it is a contest or a game.
If you are playing 9-ball, 10-ball, or 8-ball, you really don't need any of the published drills. If you consistently fail with a particular type of shot, shoot that type of shot until it isn't a problem. Easy-peasy. You don't need a book full of layouts, videos of drills that take five minutes to set up, or any of the other BS that sold by influencers. You need the power of observation and some time.
Pool is like most things. There is no magic suppository for getting better. Continuing to try each new one will only leave you sore when you sit down to watch your opponent beat you.