Quite the opposite! Since people can have faith that they are protected by GDPR, they can have machines that actually work to help them, instead of hobbling them out of fear of being exploited.
How so? A manufacturer who's found to use this information for any purpose other than calling emergency services when you crash will go bankrupt because of the GDPR. This is a strong incentive not to.
Information can be sold or leaked, abused by a single employee for personal reasons, or used en mass for surveillance, regardless of what's written in the paper. Faith is actually an accurate term for this level of trust in government. I for one reject the notion of being tacked at all times by law.