If you mean his being deaf as the "problem", then sure - there might be technological ways to "fix" that. But even with medical possibilities, some people choose to not use them for reasons.
But yeah, I stand by my point that it was an inappropriate use of a disabled actor and character. Trekmovie said it nicely:
"It was an inspired choice to have the president be deaf, emphasizing the communication gulf between these former allies trying to find a way back to those shared values of connection and teamwork. And sign language is another way to embrace Star Trek diversity and inclusivity, so we will ignore how it may not make sense for a telepathic species."
But then again - we know next to nothing about him and what happened to Betazoids in the past 1,000 years... it just seems odd, that's all. And as a member of a marginalized community, I just wish for "appropriate" representation. And not just representation for the sake of representation.