Whatever one thinks of free speech laws, this is a sovereign country and to operate there, a company has to abide by their rules and regulations.

E.g. If you want to operate in Japan you must have Japanese language labeling on your products and if you have a problem with that, you have the freedom to simply not serve the Japanese market.

Don't agree with Australian hate speech laws? Don't operate in Australia. Simple as that.

Friendly reminder that Twitter's current owner is a huge fan of the mainland Chinese market btw.