why do you design?

my goal in life and in my designs is to allow people to live to their fullest. i want businesses, offices, stores, museums, and even homes to provide people with the environment that allows them to live fully. i think that the thing in our lives that impact us most is our environments. if you love where you are you think about it less, which gives you time to do other, more important things.environments are incredibly influential and i want to mold that environment to the individual.
i have to write a professional statement for grad school and i think that if i can solidify my thoughts about what i want to do with my life it'll help me not only with the statement but with my cover letters to potential employers. i'll be able to tell them why this job would be excellent for me. my dream job is anything with gensler. i had my internship with them and it was a phenomenal experience and would do anything to work for them again. they have two positions open. one as an interior design which would be great, and another as a junior design strategist, which sounds much more awesome. there's no concrete designing. i would be assisting in creating new business structures and ideas for companies. and if that includes new designs, it does, but it isn't the only thing i'd do. i think it would help me a lot if i ever started my own company, which i'm more and more inclined to do.i'm incredibly fascinated by why companies do what they do, and being able to stick my own ideas in would be awesome!!! the first thing to do would be to apply to the position. but i'm having an awful time writing the cover letter. plus i'm not sure if they want sample work. i don't think so because they also opened the position to business majors. why do i design?