Because they want your data, it is a dark pattern. Also when you disable chat history / data collection they display a big box on the left side about "do you r

Because they want your data, it is a dark pattern. Also when you disable chat history / data collection they display a big box on the left side about "do you really want to do this" and a big green button to enable it again. There is no button to disable it in the same way, you have to dig into the settings. Basically they were forced by the EU and using dark patterns to make you not disable it as the data you provide is very valuable for them. Edit: You also have to enable this setting on every device you work on, it is not stored on the "account"..