Yes. Quite many of these phones without headphone jack or replaceable battery are, in fact, not waterproof. Removing a "niche feature" such as a headphone jack

Yes. Quite many of these phones without headphone jack or replaceable battery are, in fact, not waterproof. Removing a "niche feature" such as a headphone jack for a niche feature (no quotes) like waterproofing seems like a bad excuse to plug the DRM hole, save cost and sell bluetooth headphones, to be honest.