I was indirectly pointing out that the OP had used the first line, not as a statement of belief, but as a token so that they could say the rest of what they actually believe.
Similarly, you say "I'm all for oppressed groups having a safe space and living their lives freely", followed by "but", followed by what you seem to actually believe. Which one of your statements is true?
We shouldn't train people to retreat when their beliefs are challenged. We shouldn't train people to hold their opinions as some strange mix of subjective absolute truth. We are all wrong sometimes, and we all need to be challenged.
The OP has clearly explained why they think safe spaces have gone too far, but they've not said under what circumstances they believe that they are proper beyond a general acknowledgement at the beginning of the comment. In order to know what's too far, it's important to know where the line is.
OP has correctly exemplified the idea of 'safe spaces' being used to silence debate and discussion. Thus allowing every individual to possess their own subjective truth, and conveniently dispose with hard realities when their beliefs are in conflict with said realities. This is exactly the same as the far right in America conveniently ignoring the reality of climate change.
I'm all for oppressed groups having a safe space and living their lives freely, but the danger here is individuals retreating to a 'safe space' every time life hands them lemons. We didn't progress this far in human culture by tip toeing around beliefs.