I'm sure they do. Under some conditions, I might even be one of them. However, the drawback if data from a centralised system for coronavirus tracing is abused

I'm sure they do. Under some conditions, I might even be one of them. However, the drawback if data from a centralised system for coronavirus tracing is abused by central authorities contrary to their explicit public statements is obvious and not particularly interesting or enlightening, so I suggest we all stick to discussing the substance of the article rather than conspiracy theories. If the government wanted to track people centrally via their mobile phones, it's not as if there aren't more reliable ways they could do it anyway.