> A CEO stepping down with a humble excuse wouldn’t do them much good.
Of course it would, it makes it look like everything is calm, orderly, and that their economic system isn't under siege by the state. The CCP - as with all authoritarian systems and to the degree of the authoritarianism - is at all times obsessed with faking appearances. (insert inevitable diversionary replies: "but America")
Colin Huang desperately fled control of Pinduoduo, terrified of Xi's targeting of the next Jack Ma types. He started giving away his shares specifically to avoid getting that bullseye painted on him, to avoid potentially becoming the richest person in China.
It makes perfect sense that Zhang Yiming would be in the same boat as every other prominent figure that is scared they're next. ByteDance is even more influential and important than Pinduoduo though, which makes it clear there was no other scenario to be had with ByteDance other than to 'step down.' This process will not just continue, it's going to have to accelerate; authoritarian systems - a dictatorship in this case - either must liberalize, collapse or persistently tighten the screws on any perceived risks and opposition to maintain control. It's obvious which scenario is occurring.