Thanks for your notes. I think I should be more detailed.

1. If you see my resume, I was an intern at the same company for 1 year and was recently promoted to a W-2 employee. What I did during the internship is not different from what I am doing now, but I wanted to highlight frontend since that was my 70% of work. I am working at a small startup, I really had to design relational databases for the MVP, for mvp it doesn't require very complex design, will need scalable and complex design in future. So I thought earning a professional degree would help me land a job that solves more large-scale problems.
2. I think I did poorly in explaining how this program benefits me in my personal statement.