Not sure why the downvites, but do cities really want to invest in software engineers with enough background to analyze software patches, compile and deploy the

Not sure why the downvites, but do cities really want to invest in software engineers with enough background to analyze software patches, compile and deploy them vs regular IT technicians who can do the same job at fraction of the effort/salary and be replaced far more easily ? I am genuinely curious why would someone think that's an advantage. Please give some explanation atleast after the downvote.