The article doesn't discuss the seniority of the fired employees. It's very hard to distinguish between scapegoating and actually working to fix the problem without that information.
The problem with Uber isn't that some employees engage in sexual harassment. The problem is that there's a culture where sexual harassment isn't taken seriously, is tolerated if the perpetrators are "high performing" in other respects, and there's common knowledge that being "high performing" covers all sorts of other ills. No amount of firing of the low-level scum that grows in this environment will fix this issue.
The problem with Uber isn't that some employees engage in sexual harassment. The problem is that there's a culture where sexual harassment isn't taken seriously, is tolerated if the perpetrators are "high performing" in other respects, and there's common knowledge that being "high performing" covers all sorts of other ills. No amount of firing of the low-level scum that grows in this environment will fix this issue.