IMHO, the "Age" of "the Masters" is rarely applicable to craftsmen in these days. As someone already explained, the origin of the term came as one became skilled, knowledgeable and with enough profit that s/he could open their own business and teach others that craft or skill.
Understanding it now, I think attaining a true "Master . . . " title only comes when your peers in general recognize you have skills in this craft, knowledge enough to share and teach others, willingness and generosity and care enough for this craft that you not only yearn to do it with more and more skill, but you yearn to share your knowledge and skill and look forward to see others learn enough to succeed you.
There are a few in this group that I see many, in general, treat as Masters of some one or other aspects of this craft. There are a few I consider to be Masters in their own specialty of this craft. Not all of them are members of the Master Penmakers Guild. But they are Masters at their craft, none the less.
I have been given a "Master's" . . . And have a certificate to prove it. But not in any aspect of penturning or woodworking. And it doesn't matter to me, though I did work hard to attain that rank. What matters to me is sharing whatever knowledge, skill and passion I have gleaned through those Masters I've learned from . . . To perpetuate this craft.
Earning the title of "Master of " isn't worth spit if you don't share your skill and talent and help others attain the same. If all it does is give you a title to "lord over" others, you are not worthy of the title.
Just my opinion. And not mean to offend anyone.