Can seedless wallets actually be a good defence against supply-chain attacks?

The recent ledger attack where the hackers supposedly installed a sim that spied slowly on the display and recorded the seedphrase. Some people are suggesting that it's better go to seedless with your self-custody setup since that will keep your seed from getting recorded anywhere.

I currently use a wallet with Shamir's Secret Sharing so it goes seedless by default. Anyone trying to mess with the hardware will have to modify more than 1 part of the device and doing that in a card with ana EAL6+ chip shouldn't be possible.

That is what I believe makes atleast my setup immune to such attacks. Curious to know what others think and if there are better solutions to this.