I used to play a lot of Poker when the Poker-Boom started with Pokerstars especially (like 10 years ago)
I assume the winnings you mentioned are from tournaments which are totally different from cash games. In Poker tournaments you pay to pay the entry, get chips and have to "survive" some time to get into the money (=reaching a place which grants you money from the prize pool). You have to play till youre out of the tournament. Cash games are different, you go to a table with your money and play, you could win 1000$ with your first hand and leave the table after that round and keep the money!
Some poker players are good tournament players, some are good cashgame players, allrounders are not so common imo, as both types of play follow a slight different strategy. There are some crazy poker players who love to play high limits, who love the risk, isildur for example, he earned millions in cashgames but also lost millions. Life coach seems like a very rational guy so I assume he did make a good profit with cashgame poker.