I'm sorry 
Formulaic pop music of the modern age is designed to try and fit us all, be acceptable to as many as possible. Not very often, does the modern age formulaic music make for anything near the best in music either. It won't make you think outside the box very much. A bit like TV, formulaic modern pop music is really a bit on the mind numbing side.
It's also designed to fit the workplace, but I don't listen to music with any specific aims to make me more productive in my work. Your bosses may
have thought about that though, as I can imagine many of them would stop at nothing in the drive to squeeze a little more production out of our already stressed and over-worked minds, bodies and workplaces. So don't conform, you have your headphones, so do listen to what your heart wants to listen to.
As regards sad music making you sad, it would perhaps be good to have an understanding of blues music for example, a music that is designed and written to uplift the spirit of people that were oppressed, poverty stricken and who suffered great hardships and many injustices on a day to day basis.
My point is that Blues music along with many other forms of music that deals with the common struggles of life whether it be troubles of the heart or other things we have to endure, gives us a sense of connectivity with others, that we're not alone etc. When you consider that loneliness is one of the biggest cause of depression, and a weighty contributor to shorter life expectancy, our so called 'sad' music is of vital importance. It helps us to gain greater understanding of our own troubles as we relate to different aspects of the songs, helping us to deal with some of our emotions, our emotional times and perhaps even our emotional blockages in a safe way.
RE: Music can have a big impact on our thoughts and overall mood