It may be cool, but I still wouldn’t want to keep my seed in my brain - because there’s also a physical assault vector where the attacker can use some drugs that can be used as a truth serum - so although we often see it in movies, in some
countries it is still used when interrogation of suspects.
Truth serum doesn't actually exist - it is just hollywood nonsense, which is why "confessions" under the influence of it (whatever particular substance "it" is - several have been used) are not accepted in court. In reality all you are doing is sedating the subject and making them suggestible, and many will agree to whatever you tell them. I would imagine they are next to useless when it comes to extracting individual words. And regardless, if someone can perform a $5 wrench attack or similar to make you spill your seed phrase, then they can do exactly the same to make you spill your password for your software wallet, the location and PIN of your hardware wallet, the location of your back up, etc. Not remembering your seed phrase is not a protection against such an attack. You need to use plausible deniability instead, such as secondary wallets, passphrases, etc.
Some people even under the influence of alcohol or marijuana say a lot of things they would never say in a conscious state - and in my country we have a saying that says "a drunkard says what a sober man thinks".
All the more reason not to become so intoxicated that you lose your senses.