That happens to be the same complaint about Lightning. Blocking transactins by miners suddenly makes double spends possible through Lightning. So there is that.
Furthermore, the whole article sounds like a slippery slope argument again. And it all works at any blocksize-limit, again no quantification whatsoever.
This healthy balance between fully validating nodes / miners / SPV clients could be anywhere right? Left, right. Who knows?
And suddenly talking about passwords/accounts makes the slippery slope even more stupid, because that is what happens when fees are insanely high: You get pushed into centralised services which require a password, if only because they are cheaper….
Small blocks pushes people into solutions like Coinbase.
Up is down and down is up again. Sigh.