I reckon it's just them doing cold calculating analyses towards the objective of "keeping on suckling from the golden tit" - shame is something that detracts from personal upside maximization when saying something shamelessly self-serving will support one's own continued opportunities to make money, even if just a little bit: if claiming their work is really, truly, visionary stuff rather than the inept, uncoordinated actions of the incompetent might get them a few more months and a few more millions whilst saying no such things is certain to deliver no such gains, then the cold calculating analysis yields the logical conclusion than doubling down on bullshit is a better option than not doing so.

(I mean, this is the whole culture of both Politics and Tech "Entrepreneurship" nowadays: Keep on spewing self-serving bullshit until by some lucky happenstance something purely by chance goes right for you and you make it, or fail, either way cashing in for as long as you can keep the whole building of smoke & mirrors standing)

I expect this applies just as much when they're being checked out for possible hiring into such well paid positions (i.e. their version of "job interview") as it does in claiming that piss is in fact gold whilst defending their own actions as CEOs in order to keep on getting paid millions for what they themselves know is competence in producing a grand show of smoke and mirrors rather than of the managerial kind, so it's a natural process that keeps on delivering such people to such positions where they do such a shitty job whilst claiming that what they really are is misunderstood visionaries.