I was about to complain about this. I take security training to inspect URLs and then Microsoft safe link or whatever it's called gives me a twenty line long URL filled with random characters. I have to trust it works since they took my manual inspection ability away.
i am fairly certain that whole thing is about tracking and not security. If it was about security, then they could still include the real URL in the "safeurl" url. They do not do this though, because it is not about safety, it is about data.