This sounds good in theory but might not work in practice. None of them are profitable and depended on Tmall/Taobao for growth. Turning to the public markets would require sacrificing growth for profitability. There might be many other inter dependencies which might turn out costly to unwind.
What you are saying might be how it turns out in the end, but it is not a given.
Endless growth of unprofitable services is what has given us crazy market distortions in the past. It's what gave us things like Groupon, Doordash, and Uber, too. Growth isn't always a good goal.
What you are saying might be how it turns out in the end, but it is not a given.