Usually when people whinge about free speech what they really want is freedom from the consequences of what they say.
This does happen, definitely. However there is a legitimate point of view that the consequences have got seriously out of hand to the point where free speech is inhibited. You have the freedom to throw yourself off a bridge, but clearly the consequences are undesirable to the point where it’s not a good option. This isn’t a new thing – David Hume didn’t publish his devastating critique of organised religion in his lifetime because he knew the consequences were at the very best financial ruin and being outcast.
It’s one thing to robustly challenge an idea, but if the consequences quickly extend to hounding a person’s employer or harassing them then then that’s a bit different. There are huge areas of life and human thought now that are basically off limits for any kind of public discussion.
For example (and I do not endorse these), there are excellent and robust arguments for how liberal western democracies enable and facilitate oppression by religious groups. There are good arguments for the benefits of Chinese or Russian political systems vs Western style liberal democracies. Can you honestly imagine anyone in any kind of public role being able to even enter into a debate on these issues without suffering real and material harm?