It introduces a lower barrier to entry, so more low-quality things are also created, but it also increases the quality of the higher-tier as well. It's important to note that in FOSS, we (Or atleast...I) don't generally care who wrote the code, as long as it compiles and isn't malicious. This overlays with the original discussion...If I was paying you to read your posts, I expect them to be hand-written. If I'm paying for software, it better not be AI Slop. If you're offering me something for free, I'm not really in a position to complain about the quality.
It's undeniable that, especially in software, cheaper costs and a lower barrier to get started will bring more great FOSS software. This is like one of the pillars of FOSS, right? That's how we got LetsEncrypt, OpenDNS, etc. It will also 100% bring more slop. Both can be true at the same time.