This is somewhat true. There isn't enough revenue generated right now, but that's not an inherent part of pool. That's something that can be changed with investment and development and the pool world simply has not had enough of that.
In 1999, the minimum WNBA salary was ~$50k in today's dollars. This year, with the new collective bargaining agreement, it's $270k.
In 1970, the US Open for tennis had a prize pool of under $1M in today's dollars. In 1999, it was $15.2M in today's dollars. This year, it'll be $90M.
In 2016, the Capcom Cup (tournament for Street Fighter, the video game) had a prize pool of $486k in today's dollars. In 2026, it had a prize pool of $1.28M.
In 1999, the World 9-ball Championship had a prize pool of ~$500k in today's dollars. In 2016, it was ~$276k in today's dollars. Last year, it had a prize pool of $1M.