I still repeat my seed phrases in my head every morning when i wake up, it's a fun little ritual I have. And havent had to look at that single card for a loooong time. Eventually I burned it too.
Sure, you're free to do it your way, but keep in mind that the human brain is pretty fragile. The worst part is that things can go wrong with it suddenly and without warning. That’s why you might want to consider the bringing to bear the method I’ve developed for the long-term digital information storage, including SEEDs. It could be a better alternative than "raping" your brain every morning trying to hammer in SEED phrase into your memory.