I do not think that means what you wrote. I've seen "intellectually safe", and it gets converted to "I accept nothing outside of my bubble". Worse yet, students get actively hostile to foreign ideas.

https://www.huffingtonpost.com/entry/safe-spaces-college-int...

I think the better term is "intellectually rigorous". Let people have opposing views, but instead challenge them on logos, ethos, and pathos. That discussion is where the truth lies.