I mean it's one possible conclusion that it won't be an origin story. It seems to me another is that they want to do an origin story that will bring something new to the table.
I always try to look at the actual quotes in these articles. I've seen too many draw their own conclusions and present them as fact.
100% agree. I've found that more often than not when one tracks down the original quote in context, it's clearly not implying what the article claims it does. Which I'm sure whomever wrote said article is well aware of, but those clicks ain't gonna bait themselves!
All that said; regardless of what was intended, I do see a solid argument for there being no new "origin movie" for F4, and just getting straight into it. There's a solid precedent too since the MCU's Spider-Man never got his origin depicted (not that it matters, but we still don't know the how, when and why of the spider that bit him) since it had already been done twice in recent memory (just like F4.)
Granted, by the third Spider-Man it showed that they were playing the long game with his origin (or at least a traditionally key part of it) but the point stands in regards to first appearances.
Indeed, they've already shown at least one multiversal variant of Reed Richards without needing to explain him, so why belabour the point?
Hell, for all we know, all of the Richards/Storm clan could be introduced in the main plot of one or several other upcoming movies or shows prior to their solo outing (as was the case for both Peter & T'Challa) up to and including depicting whichever version of "hit by cosmic rays" they go with being part of the plot.
Bonus points if there a post credit stinger of them coming to in hiospital having survived whatever CG fest finale that just ended 'Quantumania' or 'The Marvels' or whatever, just as their new powers being to manifest. Cut to black. "The Fantastic Four will return!" And done.