Adding a small adapter to where you carry your wired headphones fixes the problem of the current reality where many devices do not have audio jacks. My assertion is to provide a practical solution to the current state of affairs, instead of claiming that the present is better than the past state of affairs (where there were ubiquitous audio jacks) due to audio adapters.

Due to forces beyond the individual's control, it's highly unlikely that audio jacks will once more become ubiquitous, so the second-best outcome is for wired headphone users to start carrying an adapter.