I could be wrong but I think the welds are built up and then machined/sanded back/finished somehow on these, so its a cosmetic finishing process rather than any reflection upon the standard of welding.
maybe, I have long thought that is what was probably going on but my old US-Dale welds have held up just fine under heavy use.
And your take is a condemnation of many contemporary bike makers.
ie - skip all the finishing processes - just chuck it out the door - the idiots will buy it - even if we put a premium price on it.
many modern ally welds put me in mind of those old WW2 soviet tanks - sod the finishing, it may well get shot up soon anyway, just throw it at the Nazis.
And that amount of care over the time-intensive finishing surely suggests that the welds underneath were done well?