I have no idea if this is true, but if your grandparents could not drink for a water fountain, could not swim in a community pool, plus were not going to hang out at a quarry in case some white boys decided to come down on them—probably a reason why you stayed away from water as no one taught you how to do the basics.
I don’t disagree that there is a historical reason why swimming isn’t a strong suit with blacks.
It’s time to change that so children don’t drown.