Love it. Reminds me of my late teenage years. My younger brother came out of the closet around the same time I told my parents I had become a conservation oriented fly fisherman... my Dad was so ashamed of me, he couldn't speak. My gay brother got the boat and the cabin!
Your young man has an eye for beauty methinks... at least Rainbow Trout are native to Canada and Alberta, those Bow River Loch Leven Brown Trout are exotics from the old world, or in some cases from Germany... who would want to catch a lazy, louche, decadent euro-trutta that is the colour of diarrhea?
Coarse fish vs Game fish is an old country term. Vestiges of the British Class system. Game fish were trout and salmonids, while everything else like Chub and Dace and Eel and Pike and Walleye were, well of course, coarse. A bit out of fashion here in Canada, but still used to identify seasonal fisheries and the fishermen and fisherwomen in Bonnie Ol' England, Scotland and Wales.
The rainbow trout species and myriad variants have proven themselves to be the most amazingly adaptive little fish. From Chromers, through to the California Golden Trout they are an incredible and complex example of tenacity and beauty.
Like most fathers, do you not hope that your children grow up to transcend their own parentage? Do we not hope they will go beyond our meagre ability, and fly forth from the nest to achieve their true potential? I believe your young lad is well on his way! Bravo!