My intent was to suggest a novel way to do character creation, based on Tasha's optional rules, and discuss its implications and how much appeal it has. As other's have noted, the difference between optional rules and house rules is a pretty nebulous one. It wasn't meant to be a sticking point nor was the one-true-wayism for clickbait in thread title--which I caveat-ed in the OP, and again further down the thread.
Also, I really ought not to have used elven accuracy as one of the examples in the OP. It's indicative of my view of the rules, which many of you disagree with, but whether custom origins work with racial feats wasn't meant to be the focus of discussion. If it bothers you, feel free to assume that the suggestion in the OP would be implemented without them.
So... would any of you guys consider trying this character creation method at your table? Can you see any upsides, or just downsides?