From a repairman's point of view. I have been playing for much longer than the time when I decided to buy my first lathe and learn more about cues.
I do mostly repairs and dabble in the building side. I feel that I still have much to learn re the repairing side. Yet, I still know what it takes and what goes into building a playable cue.
A cue maker doesn't have to be an A player to know or realize what it takes to build a good solid cue. I can pick up any cue, set up a few shots and know if this is the one for me, at least in the long run. Granted, with any new cue, it does take more than a few shots, more like a month or so sometimes to learn how to use your new cue properly.
Now days, cues are commonly cored, some with a one piece solid core thru out the entire cue. Makers spent a great deal of time, and wood learning about different types of wood and how they match up together.
When you bring coring into the process, the actual wood used to core with is a huge consideration. Maple, Purple Heart and other even more exotic woods are being used these days.
Each maker has their own feel and opinions re choices of wood. Luckily these days, makers do share their knowledge freely with other makers.
One maker may prefer X type of woods and cores with a forward balance. Others, the opposite.
Shaft wood and tapers are as individual as the makers themselves. Same with the butts.
So, all a maker has to be able to do is set up a few shots, make some balls to be able to figure out if they are going in the right direction, at least for them.
Feed back, hit, deflection, stiff or soft, balance etc. All major considerations.
Then they are free to make changes that they feel are necessary. Much trial and error
for most along the way.
The end process is that the maker is now satisfied that they have the knowledge of what they need to do to start making consistently, their signature line of cues.
No two makers are going to be exactly the same, Isn't that a great thing. I am sure that there are many that would like to duplicate what it takes to make a Gus, Searing or a Gina.
So, short story long, as I am famous for, a maker doesn't have to be much of a player
to know what it takes to put together a great playing cue. All they have to be able to do is, as I mentioned, to be able to set up a few shots and be able to
judge their own workmanship and how it parlays back into what they are trying to achieve.
Rome wasn't built in a day and neither are the signature traits of good to great cue makers.
Obviously, opinions will vary but that is how I see it in a nut shell.