I think it's beneficial to have a place where you can go and be by yourself and think through things without distraction. For me, that's my apartment, but for people who share living accommodations it might be somewhere else. But having somewhere you can retreat to when life circumstances are difficult is important.
Beyond that, I don't really get the safe spaces in public areas debate, and why what we had 15 years ago isn't sufficient. There are already social mores around what is appropriate in public and what is not, and if someone goes too far outside those, they often are confronted about it, if not explicitly than by being shunned or ignored.
I'm also very much a believer in the importance of freedom of speech (and believe "left-liberals" who don't support free speech are not true liberals, even if they may be economically leftist). Yes, I think it's a little over the top for the pro-gun-rights lobbyists to march with semi-automatic rifles in front of the statehouse, and no, I don't buy that the end times is coming as preached by a few Hebrew Israelites near my bus stop recently. But both groups (and others) should be allowed to discuss their beliefs, even if it may make some people uncomfortable. If I'd really felt intimidated, I could have always just crossed the street instead of walking by the militia, or walked on to the next bus stop rather than be somewhat distracted by the talk of fire and brimstone, and neither group would have tried to stop me.
Of course once you get into groups taking physical action against people, intentionally harassing someone (not just saying things that the other party disagrees with), etc., there is an issue, but that's where the part of the law about protecting people from each other comes into play, not before anyone says something potentially offensive.