From my point of view, many programmers hate Gen AI because they feel like they've lost a lot of power. With LLMs advancing, they go from kings of the company to normal employees. This is not unlike many industries where some technology or machine automates much of what they do and they resist.
For programmers, they lose the power to command a huge salary writing software and to "bully" non-technical people in the company around.
Traditional programmers are no longer some of the highest paid tech people around. It's AI engineers/researchers. Obviously many software devs can transition into AI devs but it involves learning, starting from the bottom, etc. For older entrenched programmers, it's not always easy to transition from something they're familiar with.
Losing the ability to "bully" business people inside tech companies is a hard pill to swallow for many software devs. I remember the CEO of my tech company having to bend the knees to keep the software team happy so they don't leave and because he doesn't have insights into how the software is written. Meanwhile, he had no problem overwhelming business folks in meetings. Software devs always talked to the CEO with confidence because they knew something he didn't, the code.
When a product manager can generate a highly detailed and working demo of what he wants in 5 minutes using gen AI, the traditional software developer loses a ton of power in tech companies.
/signed as someone who writes software