It's simple, I can buy some IEMs that sound better, cost less than a third of a barely-even-comparable wireless earbud, and roughly conforms to market standards so I can swap out the cable and tips. And I never have to charge them. I have a pair of Airpod Pros that I use solely for audiobooks and podcasts when I'm doing chores or shopping, but the audio quality is so garbage that's all they're really good for.
Airpods Pro audio quality "garbage"? That is beyond harsh, and a quick search will find countless reviews extolling their audio quality. e.g. https://www.soundguys.com/apple-airpods-pro-3-review-close-t...
If you are lucky and have a good ear shape, then airpods sound good. Still not as good as IEM because IEMs have more space for better drivers without needing a battery or bluetooth hardware.
But if you are a person like me who has very hard time with any earbud staying in, then its gonna sound like garbage because you are never going to get a perfect seal.