“…doing so would require a fundamental shift in their power structures, claims of authority, and core beliefs, which the current leadership appears unwilling to undertake.”
Yes, but I think the argument could be made that they are unable to make those shifts… at least, not with any substantial long-term success.
If they keep doubling down in the face of increasing indications that they are, in fact, wrong, they alienate more and more members with half a brain…
…but…
…dispensing with so many of those things unique to JWs threatens to do the same thing, because they were held up as proof they alone had The Truth.
Ultimately, either option undermines any incentive to stay.