Absolute poppycock.
> concerted effort to place backdoors
What? Have you thought this through just for a second? How does this even make ANY sense? Why would everyone and their grandmother then be pushing for, and deploying, PQC in *hybrid* modes with classic algorithms specifically designed such that backdoors in PQC are only useful if you can ALREADY break classic stuff? And, if they could already break classic stuff who in their right mind would push for PQC at all if they actually care about breaking crypto? Lets not let a love for conspiracies and cynicism get in the way here.
> the proposals are so laughably weak
mmhmmm... care to share? its not like this stuff hasn't been vetted for at least 2 decades by academics the world over soon joined by governments and now industry too. most of that very publicly and very internationally. nor is it like problems weren't found along the way and designs discarded. no, the vetting process has been distributed, public, long, excruciatingly detailed & paranoid and exacting. so please please, enlighten me what motivates your bold claim here.
> QCs, if they ever work, cannot win an arms-race against conventional computing in this space.
QCs work today. the question is, of course, scaling. and though its not actually entirely clear what your sentence is really trying to claim. (To be a serious threat, QCs dont have to break contemporary crypto. Its enough if they break today's crypto since we've largely not transitioned yet. thats a race against time not conventional computing tech.)
That aside, what is clear to me is that neither you, nor I, nor anyone else can possibly know how QC tech will play out in the coming 3-5 decades. And I say 5 decades because thats *conservative* lowerbound on how long we need some today's encryption algs to provide security for us for the more sensitive use cases.
In fact, the only way anyone could know if QCs will ever be powerful enough to break meaningful crypto is if they already have. On a related note, just a few years back the chinesse quite suddenly went from being very vocal about there (rapidly accelerating) quantum and QC research to almost going complete dark about it. This, of course, rattled a bunch of cages in the west. E.g. we very soon after got that white house memo mandating a PQC transition across the US gov.