This 'sunday morning philosophy' reads like this:
there is something called scientific method, but real scientists say, actually we don't use it.
Maybe it's only used in universities to train the students?
Possibly it would be better, to teach a different method, that is of higher practical value.
And maybe it would be useful to put kind of red flags on certain theories, warning of hypothesized foundations.
Otherwise one could pile up theories on unproven speculations and that on piles of other speculations.