I tend to agree with the last statement, particularly as a "cultivate interest" program, but I'd quibble with some of the details and implications before it.
AYSO Core is inexpensive, but at least in some areas, is very marginal at higher ages, and very hit/miss even at lower ages. Both my kids did AYSO Core, and the experiences were highly contingent on the volunteer coaches and team enthusiasm. Additionally, there will be kids who do not play soccer on each team, and the experience for anyone skilled (even at a young age) will be pretty marginal. I would not recommend Core for anything other than a casual exercise program, beyond around 8-10.
Extra is better, but not SoCal flight 1 level in many cases. My son also did Extra pre-covid; we were around a flight 2-3 level, I'd estimate. We absolutely had some marginal kids on the team as well, and this was impacted by lack of options. The coach may care more, but there's no world in which our experience was remotely close to a high flight SoCal League team. All Stars teams are generally better than Extra, at least in our area.
United has been better in some cases, depending on the teams and regions (ie: there are United teams which are on-par with every SoCal League flight). But also, hit and miss depending on the area (in our area, highest level United team was SoCal F2).
Side note: If AYSO hadn't been so risk-averse coming out of Covid, and resumed their program a year earlier when everyone else did (particularly since all their activities were outdoors), we might still be playing Extra/United. We mainly went to club because it was the only option at the time, and I know many families in the same situation. AYSO really shot themselves in the foot with that obvious blunder, and probably set back their program significantly as a result. The AYSO leadership is 100% to blame for that failure, though.