Have you ever learned from your master where and from whom he studied? :)
I regularly take part in master classes conducted by these tattoo artists in order to get the maximum amount of knowledge and experience. I spend a lot of time and money on advertising, renting a tattoo place (I am a self-employed tattoo artist and pay taxes for LLC), training, and supplies.
Remember, years of experience don't mean anything, it's just numbers.
In addition, a tattoo license does not say anything about the quality of work. Every tattoo artist has it, it is possible to get it in a day by answering basic questions. All this is very important, because it will be on your body for the rest of your life.