We can do better than that.
The coach and athlete have to communicate and understand all the gaps in the game up front. They have to take the time and cultivate the base before things get intense and the fancy toys come out. From there the push can build and build, but not without careful monitoring.
Every stress has to be considered, every addition to the training program must be accounted for. That’s what makes measures such as heart rate variability so damn useful. It’s an early warning to correct course before the rush takes hold, before the wear, tear and bad habits really start to set in.
Without that data programming is only educated guesses and serial assumptions.
Be honest, assess status, progress slowly, get all the data you can, then regulate the plan. Be honest, quantify it. That’s the quickest path to improved performance.