There is no decentralized solution to the BGP problem. Period.
For a moment, just consider this; you are saying that there is no solution to BGP in trustless anonymous systems, but: If you take a snapshot of the current bitcoin hash rate and equally divide it out between N generals of fixed and equal hash rate, this is now classical BGP. You must be forced to concede that you are in fact saying that there is
no solution to BGP at all, which is clearly false.
Look he is saying there is no "unconditional" solution, which is absolutely correct. There is a solution, which may work, or may not work, depending on the state of the world when it is applied.
That is very much the same as Bitcoin, and stated as such by Satoshi in the white paper. Bitcoin is not unconditionally anything. If a majority of CPU power is conspiring to attack it, then it is failing.
Though Bitcoin does have a somewhat nice recovery property in that the failure only persists
as long as 50% of the CPU power is conspiring to attack it. Unlike, an airplane for example. If too many components "temporarily" fail, then it may be catastrophically disassembled before they recover.