Weta said..Obviously the dips that red thumbed me also have NO clue about sailing rules or right of way when leaving the beach

Weta - I was on a starboard tack heading away from the beach, SE Easter blowing, right arm forward. Sailboarder was on a Port tack heading away from Straddie, left arm forward.
If I was literally "leaving the beach" I would obviously have waited for the guys to turn around, stop, get out of the way, whatever..!? not simply taken off into them. If they were "approaching the beach" they wouldn't have been travelling at speed. We were some distance from the beach.
Suddenly stopping and sitting the kite at 12 wasn't really an option given the speed we were all going and I probably would rather have taken my chances on the water rather than in the water. I was also expecting the oncoming WS to give way and bare off downwind. Looking back this would have been difficult for him given two other windsurfers travelling downwind of him so he was in fact stuck.
Strictly speaking did I have it wrong then ??? Apart from the "avoid collisions at all costs"