If we cut out the disparity, but kept our current dating prices would there still be a crises
Our current dating practices include age gap, but I’ll assume you mean that we change the age of boys to a younger age, the boys marry older girls than current practice, or a combination.
The answer I believe is that we would still have some singles. We would certainly have fewer older single girls, and possibly fewer older single boys.
The reason I think we might even end up with fewer older single boys is because if we level the playing field somewhat, and take away some of the advantage boys currently have, we would very possibly cause the boys to have lower expectations, and that might help some of the tougher cases to get married.
Whether after these changes were affected we would still have a “crisis” depends on how you define crisis.