One thing to consider is that professions such as accounting, law, medicine, and (at least here in Canada) engineering rely quite a lot on degrees and professional certifications for hiring decision. Software does not.

The good side of this is that in order to get hired in tech, you don't need a degree or a P.Eng. The downside of it is that you as an employer have to do the entire vetting yourself, instead of relying on universities and professional engineers associations to do a significant part of the vetting for you.

EPC companies do not give their civil engineering job candidates a civil engineering equivalent of fizzbuzz, because they don't have to. If they are certified, they have demonstrated they possess the required knowledge. I cannot see how fizzbuzz can be eliminated from software without a similar certification process being created in its stead.