How would you have a digital collectible without blockchain? The alternative is just a private database somewhere that depends on the whims of a company/individual for its continued existence.
As do most things so it's really neither relevant nor a drawback worth discussing.
>Why does ${PROJECT} use ${TECHNOLOGY}?
>So it doesn't have ${DRAWBACK}.
>Most other things have ${DRAWBACK}, so it's really neither relevant nor worth discussing.