I see little real difference between using proprietary software and using AI to generate software in terms of the freedoms allowed to the end user. The entire point of the free software ethos is that the end user should be in control to the degree that they want to be, not merely to the degree that a proprietary service allows. If nothing else the obliteration of programming culture and education and the mass deskilling created by the normalization of AI works against that ethos. It turns programming into just another form of capitalist consumption.
Which is all well and good if you don't care about such things and just want the end product but AI shouldn't be conflated with FOSS. A tool that strips knowledge away from people is antithetical to the culture even if the end product is high quality.