I'm sure it's true. Personally I'd blame the high cost of living combined with the high cost of flying, and the inevitable pressures of being in your 20s.
The solution is almost certainly ways to fly which don't put too much pressure on either the wallet or the diary. To be frank, that eliminates most club rentals, and most gliding clubs.
It pretty much leaves big well run syndicates on modern aeroplanes, and the lower price-bracket microlights. But is anybody selling these to young PPLs and potential PPLs? Dunno.
G