One who has practiced a skill for a long time tends to be admired, as many equate number of years spent to skill achieved.
But as you meet more people who claim to have extensive years of practice, you will arrive at the realization that numbers do not always provide a full picture, and context is key.
One who practices a skillset once a week for 30 years cannot compare to another who practices the skillset on a daily basis for 30 years.
One who practices a skillset daily for 30 minutes over 30 years will greatly differ from one who practices the same skillset daily for 5 hours over 30 years.
One who concurrently practices multiple skillsets for 30 years will not be the same as another who practices a single skillset for 30 years.
And what about comparing one who practices a skillset an hour a week for 30 years, with another who practices the same skillset daily for 5 hours over 5 years?
Furthermore, there are more aspects to take into consideration, like the depth of study, the intensity of training makes further difference.
Indeed, numbers can be misleading. Without the proper context, numbers can be meaningless.