Agreed Fishhead, JD and others may or may not have ever heard of Billy Baxter, Joe W Brown, Artie B, BW, Herbie Hoops, Tiger, Poker gang, Sonny Reizner, Bob Martin, Lunatic, Lem,etc..or possibly wouldn't recognize them if sitting at the next table over.
DeMarco, I can testify firsthand to being born unto a family of pros & BMs, having known others, and met plenty of people that haven't had an "official/regular" day job for the majority of their adult lives(if ever), yet admit as an disclaimer that the vast majority of pro bettors have had lean times, where they have went into debt or quit, only to return later, and must admit many of these people put pen-to-pad for the majority of their bankroll building, as an income to survive the brutal learning curve that the lifestyle brings.
JD, your premise is correct, as less than 1/10th of 1%, have the necessary mental makeup/ connections/bankrolls/intellect/dedication/info/
etc..to attempt the brutal grind of making it a living.
But you may be surprised as to how many have done it, and still do, though most all old-timers will agree, that it's tougher today than in the past, when they were far ahead of the information relays/changes, & their sophistication edge not as commonplace.
Your premise is correct, in that most stout pros today, must get their money in, and get it out, and pick their spots to play, unlike the past markets of larger limits, personalized lines, slower line relays, varied local lines, LCN/NYC/stores of size,etc..that provided a more year 'round approach/market for many syndicates/pros/followers/middlers/movers/ Bookmaker's bookmaker.
But as any BM or guy in the know here can attest, there are people that do it year-in/year-out in the black!
Any of the many SB managers that visit here, or other moderators in the business care to testify?
JD, if you intended that over a lifetime, that "most" pros/wiseguys have a losing percentage or are in the red, I'll tend to agree, but many have went on to fatten up after graduating their learning curves, or fat career making runs then reducing play sizes.
As for saying a "few" may have won and quit ahead, there are more of them than just a few, yet sadly you are right though, there should be more that walked at their pinnacle..yet most crash and burn.
JD, there is a reason that quite a few folks have to use movers, beards, and runners to get down..it's called "winning"(the art of picking winners)!
There is also a reason why there is a term called "Bookmaker's bookmaker"..it's winning so big for so long, that their regular to larger wager size can often only be made, when a store makes offerings as to balance their entire sheet to certain games..othewise must fill up by piece-mealing.
It takes serious winning to pay the overhead of movers and their legwork fees/commisions, in order to just fill up.