The sport is growing very fast in the USA. It's growing because businesses decided it was cool to have tables at work, and because people are opening for-profit clubs. It isn't growing in schools, or through municipal government, community-based non-profit clubs, or the national association. As noted above, this is America, that just isn't how stuff works here. The reason there's one of these threads every month moaning about the state of US TT is it's growing from the bottom up, with tens of thousands of bad players playing ping pong. And we all want lots of 1800+ table tennis players. But out of every million bad ping pong players, a few hundred, or maybe a thousand or two will get wound up in it enough to become tournament TT players. That is how TT will grow and improve as a sport in the US.
Back in 2010 a few guys started a bad, one-night a week club in my podunk town. They got a bad, humid space in a community center with tile floors, low ceilings and not much room. They bought some cheap bad tables, and about 15 - 20 people started to play. That's where I started playing in 2012. And in 2018, some of the players had turned over, and the club had moved three times, but it was still the same crap club in a different bad space. Then in September a friend who also started in 2012 rented an empty storefront in the local mall and made it a six-days-a-week fulltime club. It's his first month of operation and he is already making a profit. A lot of it is from mall walkers coming in to play ping pong instead of browsing the stores. And many forummers would say that's not TT. And it's that attitude that is keeping table tennis from growing even faster in the US. Pingpong players are just TT players who aren't that good. Like most tennis players, and golfers, and I'm sure bowlers and rock climbers aren't very good either. It takes a boatload of bad players to get one good player, because most people aren't that into it. But the more bad players you have, the more good ones you will eventually get. It won't be USATT, or schools, or community clubs making that happen. It will be full-time, for-profit club businesses, because they have the only motivation that gets things done in the land of the free and heavily indebted, money.