Pixel Buds are the same way. IIRC from a teardown vid, those earbuds (and I’m guessing most of their competitors’ too) are designed to be quasi-disposable in this way. They’re glued together, the only way to open them up destroys them, warranty support consists of replacing defective earbuds.

This business model does create an e-waste issue… More lithium ion batteries ending up in landfills, more gold extracted from components by kids in developing nations burning them and breathing the carcinogens…