Agree we all lose in the long run. Even a bet with negative expectation can bring you profits it all depends on the time when you stop making bets. Professional traders just shift aggregated positive returns on the infinite timeframe closer, while for amateurs its more evenly "distributed" on the timescale. That's why it's not always suitable to judge only by statistics.When people use the word "gambling" in the pejorative sense they mean placing a bet with negative expectation. Most traders are gambling in that sense, using systems that are no better than the fool at the horse track who thinks he also has a system based on ideas from the 1970s.
On the flip side though, I can't see any good trader who places bets with positive expectation not seeing themselves as a gambler too. To not be able to see gambling,trading and investing as all different shades of risk taking and trying to run systems with positive expectation is just so newb to me. Honestly, if someone on here says they are not a gambler I don't even care what else they have to say. You don't even understand the game you are trying to play and are basically deluded.