Repetition builds mastery. How can you expect to be good at something, let alone great at something, if you only practice it every once in a while? Can you master anything if you do it once per week, month, or year? No way. And the more difficult the task at hand, the more effort needs to be put it in master it.
Are you willing to invest the time and effort needed to become a top producer in your career field (or whatever happens to be your goal)? If it takes 10,000 hours to master something (as Malcolm Gladwell suggests), how can we get to that requisite time more quickly? 40 hour work weeks x 50 work weeks per year = 2,000 hours. So you would need to do this for 5 years to master it. Can you study, read, or experience more to shortcut this time though?
Everybody wants to be the best. Everybody considers themselves above average. But there is a difference between saying you want something and meaning it. If you truly mean it, you’ll spend those extra hours working at improving your craft. And while you probably won’t see an immediate return on investment, the incremental improvements will compound over time and eventually get you to where you want to be.
To master anything, you need time to do it and practice reps to get you there.