I have said this before but I'll say it again. 49er sailers started on Optis or whatever when they were 5, 6 and 7.
That is where the choices start, cat sailing needs a small no trap boat in the Olympics to aim at ( against the Laser) and a tiny 7 year olds start up boat. If it doesn't start there then it will always be trying to convert half boat sailors.
Cat clubs would have to invite the youngies into the fold with club owned boats and uncomprimising dedication to the next generation.