Having bad PR for China will embolden the secessionists. Having bad PR will mean that the US politicians and public thinks that China will be a pushover. Having bad PR will mean that India, the UK, Australia, and the EU will feel emboldened to get more and more aggressive with China in the coming years. China can have the best military in the world by 2030, but if the public perception is that China's weapons will fall apart like plastic toys and that Chinese soldiers will turn tail and run the moment America comes knocking then that WILL raise the risk of Taiwan officially seceding AND raise the risk of America getting kinetically involved AND raise the risk of other nations getting involved which WILL mean more Chinese lives being lost.Worrying about PR is a waste of time. China isn't good at it since it doesn't control the high ground (dominant media) and, much more importantly, it doesn't count for shit. If you're getting clowned on Reddit and Twitter, just keep off them for a week until this blows over.
Or better yet, come to r/Sino where we have zero tolerance for any trolling.
If China's PR and posture is good enough, the takeover of Taiwan can happen without a single bullet being fired. If it isn't, then China will be wading through what probably will be the bloodiest war in human history.
Worrying about PR is not a waste of time. Every single country or actor that China fails to intimidate through the perception of Chinese prowess and resolve is a price that the Chinese people will instead have to pay for with their treasure and blood. PR matters, even if the PRC would rather it didn't. Anyone who says otherwise is, quite frankly, just coping.