Watch some engineers in other disciplines and you soon recognise that many of them have about the same responsibility as a software engineer. Design is design.
Or read about engineering failures like flight QF32 (mostly a success story):
A paperwork review showed that the required signatures were missing from 131 out of 138 retrospective concessions issued between 2009 and 2011
https://admiralcloudberg.medium.com/a-matter-of-millimeters-...Australian Quantas, with a UK Rolls Royce engine on an Airbus, with engines maintained in Aussie.
Safety is now often made up of interlocking: regulations, standards, quality systems, safety management systems, insurance, international legal contracts. Certified engineers and signatures are usually only a very small part of those systems.
Certification matters less than you might think across international borders.
Perhaps I'm a cynic, but beliefs in certification seem so irrational to me. What is it? Jealous desires for status? Desire to have guilds/gatekeepers? Complete misunderstanding of how safety occurs in "real" engineering?