Jack of All Trades

Jack of all trades, Master of None.
On a practical note, it's always beneficial to have more than less, of knowledge.
Yet, trouble with knowing bits and pieces is, it may not be sufficiently enough for a solid conclusion. I often wonder if that is as bad as the saying goes.
As the complexities of life become more tightly binded, there some advantage in having a broad spectrum-type of knowledge. In my opinion, knowledge is never a waste.
We need to survive in this fast-changing world and every bit of learned trade, does help.
Perhaps the saying was making reference to building an empire in some business - which to me, may not be the dream of many average people. Most average people simply aim for a good-paying job, with a reasonable amount of extra cash to splurge now and then. There are also some with dreams of being a billionaire, but that's the 'wish upon a shooting star' and not many make it their REAL goal. Who doesn't want to be rich and famous?
For this reason, I do not believe in this phrase - like in the generations past, mothers washed clothes for cash, cooked for her family, sold cakes during the festive season for extra, perhaps also did some tailoring or alteration work for the cottage industry. That's a Jill of all trades - she may not have become a world renowned label, or a chef or even own a laundromat, but she's the master in earning extra income - and isn't that what that matters in the real world?