Out of curiosity, how long have you been working as a developer? Just that, in my experience, this is mostly true for juniors and mids (depending on the company, language, product etc. etc.). For example, I often find that copilot will hallucinate tailwind classes that don't exist in our design system library, or make simple logical errors when building charts (sometimes incorrect ranges, rarely hallucinated fields) and as soon as I start bringing in 3rd party services or poorly named legacy APIs all hope is lost and I'm better off going it alone with an LSP and a prayer.
As someone who worked on a Deloitte government project in Aus, they'd have got a better product (or anything at all for that matter) for way less money by just hiring a small dev team internally. Instead, it was outsourced, and they were offered a bloated Sitecore .NET monstrosity. The project had completely stagnated before the pandemic, and then that was the final nail that got it abandoned.