How are data brokers legal if anybody could buy from them?

I was wondering how countries made being a data broker legal? They could sell your data to ANYONE regardless of what they are going to use it for - scammers, spammers etc. What are the justifications for that , it literary makes no sense to me. In any other business if you do this you would get fired or sued. For example if a hospital security guard gets paid by a random person to tell them who visited a hospital …

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