I still speak my mind openly in the work place and invariably I find that most people are actually delighted when they realise they can have open conversations with me without fear of judgement. The vast majority of people are still entirely reasonable.
Of course you never know if you’re going to say the wrong thing to the wrong person, but I don’t go to work to make friends and I certainly don’t go there to be intimidated by bullies.
I can count the number of unreasonable people I’ve had to deal with on the knuckles of one finger and they all skulked away pretty quickly when they realised I was standing up to them.
I’m not trying to downplay what you’re saying. I think there is a culture of fear and I think it’s been stoked deliberately to a certain extent, but I also think it’s a lie. Most of the people you work with are probably like you. That may also explain why you don’t notice them ;)