DISH Project Manager interview questions

I got an email from recruiter to set up the first interview. The interview was setup for next day. In the morning, she said another recruiter would reach out to me. He called me, told me they are moving forward with someone with more project management experience. He did not even conduct my interview. The call lasted less than 2 minutes. Why did they need to be so unprofessional and waste someone's time when they could have sent a rejection email?