In interactions if people are not curious to understand (which implies not knowing) then how can they expect to hear what others are really saying? 

Unless it matches precisely what's already being assumed the interaction is low quality at best.

To some extent it's not about listening, or the capacity to listen which I think is inherent. We tend to tune in and listen to things that have importance to us and tune out the things that do not.

If you understand what matters and why it's important then to a large extent tuning in and tuning out will work out very well. And here is where the problem lies, Do we really know what matters?

So it may be a good idea when communicating to understand what you're talking about, what's crucial for people to know & why they should care... If there are consequences and implications of not doing so maybe it's good to point them out in a way that has a chance to resonate.

When listening try to figure out what's important and why. Ask questions to help others articulate what they may not be explaining too well and draw out the implications.

You never know. A seemingly trivial interaction may become a deep and meaningful one, even if the conclusion is that nothing was really that important to start with... 

Everyone wins in a no lose interaction...  

'The single biggest problem in communication is the illusion it has taken place.' – George Bernard Shaw.