One thing that becomes apparent when working on important, safety critical stuff is that cross-disciplinary problems require a team, many of whom are not SWE, because there’s a ton of domain specific and tacit knowledge a SWE generally won’t know.

Writing software to control a rocket or surgery or, hell, just a commonplace boiler shouldn’t be approach cavalierly.

Edit: to the downvoter(s): what claim do you have issue with? Do you think safety critical software can be treated cavalierly? Or that SWEs can replace that domain knowledge without other domain experts?