I very much agree. Also, in a lot of places, that indicator on your license is not legally binding, the decision still comes down to your next of kin.

A system where everyone is a donor by default, but can opt out in a low-effort manner such as sending off a signed declaration, would still allow those with a genuine desire not to be donors the ability to do so, but would greatly increase the donor pool by capturing the majority of indifferent people who simply have not made the effort to opt in.