I mean YOU don't have to buy 2. Your inheritor needs to get the other one. If they're serious about that they'll spend $150.
Bitkey did not make clear to use the inheritance feature you need to buy two bitkeys. This makes it both double the cost and much less noob friendly imo. Still a great start but a downside that should’ve been made much clearer. https://support.bitkey.world/hc/en-us/articles/32959918821012-I-have-been-invited-to-become-a-beneficiary-what-do-I-do
Discussion
I suspect my situation where potential inheritors are not into bitcoin and really don’t want to deal with extra hardware is not uncommon.