I’m 6’ 2” and wear a size 13 shoe. I’ve skated everything from as small as 7.5 in the early 2000s, then stopped skating in 2016, and then coming back and board sizes had changed. So I got an 8.0 thinking that was wide AF but then I realized that most people skated boards 8.0 and up. After that I experimented with different sizes and worked my way up to 8.5 which I stuck with for maybe a year. In that time I also skated one 8.75 deck. But now I’m down to 8.38 and am trying to go back to 8.25 because I know I can skate smaller boards in the past despite my size/ shoe size. Size sometimes matters but these days I see dudes skating boards with practically their whole foot fits on the top of their deck.
The fact of this, plus my experience in the early 2000s, allows me to conclude that deck size is not always proportionate to your height/ weight and shoe size. Everybody is different, and as they said, to each their own.