Did the writer of the sequel Friday The 13th Part 2, and writers of all the other Friday the 13th sequels not see the glaring logical issue of never explaining why the kid Jason Voorhees didn't drown in Crystal Lake?
Highly illogical that he didn't die according to Friday the 13th Part 2 because the kid Jason Voorhees can't swim, and it's never explained how that same kid that can't swim didn't drown in Crystal Lake.
Maybe that inspired the awful lazy writing for A Nightmare on Elm Street Dream Warriors because that movie retcons Nancy died in the 1st movie, and never bothers to explain why she isn't dead in the 3rd movie.