Centene Data Analyst I interview questions

I had a great experience during the interview. They listened to me carefully as I answered their questions and also, provided me feedback whenever I left out details of my answer

asking previous work experience. However, they do not provide sponsorship or even transfer visa. Other than that, it is a normal phone screen process. Most companies have discrimination towards work visa holders. If you do pick up my resume from the pool, it only proves that I am a good candidate for this position. Why status is the thing blocking people from opportunities?