If I want to buy something for a hundred satoshis, and I only have an indivisible note for 1.358154 bitcoins, and the seller only has indivisible 3.5784565 bitcoins for change, then our bitcoins are frozen and we will not be able to complete the transaction, while normal bitcoins could always be used to pay.
totally true,
but exchanges (with strong KYC that offer) are there to solve it for you - pretty easy. just give your indivisible 3.5784565 bitcoins to an exchange and ask for different amount of BTCs (e.g. 2 BTCs as others Bitwish NFT + 1.5784565 classic bitcoins).
no body hates the fees to provide such services..