Your brain is designed to be easily distracted. The first humans needed to be aware of a rustle in the bushes because it might be a tiger jumping out to eat them.
This means when we are focused on our work any text, email, call can distract us from the task at hand. With smartphones and computers in front of us we know where to get little hits of dopamine. Once we hit a road block on the work at hand we have our patterns and outs to run to.
The distractions are endless and if you do not focus and work on your focus then you will not accomplish anything.
You must be able to sit with the uncomfort and solve your problems.