So, gunner, how many rounds did you put down range, before your supposed epiphany, of not shooting live rounds? Do not give new shooters such advice. Ever.
If a person is not proficient, then you are correct and sufficient range time is necessary to get to be able to handle the weapon safely and efficiently and to put them all in the black at 50 yards.
I was firing 500 to 1,000 rounds a week until I was introduced to the methods expounded in the book I mentioned, and I found I could cut my practice rounds expended in half AND improve my scores in matches using them.
A shooter who is proficient today will not lose that much of an edge (excluding long range work) by laying off and saving resources for as long as this thing takes to conclude.
You might want to read about mental practice before deciding when and how it is to be used. Many athletes use visualization. It’s useful in athletics and many other situations.