Agreed — though I think the big ADHD-specific barrier is anxiety around all the non-cooking parts of the process: finding a recipe, figuring out which dishes and equipment to use for prep, knowing what ingredients you need at the store, etc.
Keeping the pool of recipes ultra-tight removes a lot of hurdles that an ADHD person who hates the labor of cooking would trip on, whereas I’d tell someone who was really eager to learn cooking to experiment broadly or read some kitchen-philosophy books instead of iterating on something basic right off the bat.
But zooming out, you’re spot on; this is just a strategy to make it easier to get the practice reps in :).