> Most communicative problems I have ever seen (aside from language barriers) could have been resolved by a little bit of empathy.

Empathy is usually an internal process. On it's own, it wont't resolve a communication problem.

What ends up affecting a communication problem are the external actions that we take based on our internal empathy calculus (assuming we haven't totally miscalculated). Those actions will vary significantly by person and context, assuming any action follows at all.

Empathy is the relatively easy part. Acting on that empathy in a way that doesn't come across as condescending, disengaged, presumptious, judgemental, awkward, or scripted, while also remaining true to yourself and upholding your personal values are the hard parts.