Are there any justifiable reasons that it’s okay to be on speakerphone in public?

I once saw this question asked on the other site, and there was at least one good response. It was from someone who used a hearing aid, and said that for whatever reason, using the phone normally next to their ear resulted in the audio being garbled and difficult to understand, but using the speaker held a few inches away was fine, so that’s how they preferred to use it.