Frankly, "Singer" doesn't know what he's talking about. At all.
Me personally, I stopped getting "thrilled" by winning money when I was about 17. I also remember being in Las Vegas for the Rams playoff run when I had them at odds from 100-1 to 300-1 (they beat the Titans). I had to acknowledge that I really was a cold-blooded professional when my focus was not on the mega-profit in my sights, but on getting the best odds on the Raiders to win the AFC and SB for the following year. It was all just "doing the job," more or less. No thrills, no chills.
P.S. Raiders made it to the AFC title game the following year. I made a small profit. Some of my tickets were at the Desert Inn, which had the best odds. The Desert Inn closed in the interim, however, and I had a wonderful adventure verifying that I'd get paid if the tickets won. Not as easy as Gaming Control always says. I also had some year-old tickets turn black because they had been printed on bad ticket paper. Had to verify all tickets at the original books, which was another adventure. I learned a lot.