The consideration of B still comes in when the bitcoin needs to be exchanged for actual goods or services though, where the payment (at least in 99.99% of cases

The consideration of B still comes in when the bitcoin needs to be exchanged for actual goods or services though, where the payment (at least in 99.99% of cases) needs to be in traditional currencies. So bitcoin has not really removed a problem, bitcoin has just moved it. My argument is at least somewhat under the assumption that the trades/exchanges need to be legal to be mainstream. If you assume only illegal trades then of course it easier to postulate a system that works since it does not need to consider how it would work internationally or within a state. I don't think I'm confused (but then again confused people usually think they are not), but I do think that modifying the traditional system is far more reasonable and doable than moving to the alternative crypto/blockchain system. Considering all the money and manpower thrown behind crypto I'd say it's not unreasonable to think that a better system building on the traditional finance system could be built.