That's the point!
the report from the Taskforce on Innovation, Growth and Regulatory Reform (TIGRR) moaning about GDPR:
GDPR states that data should be "collected for specified, explicit and legitimate purposes" and be "adequate, relevant and limited to what is necessary." The report moaned that this limited "AI organisations from collecting new data before they understand its potential value and they also mean that existing data cannot be reused for novel purposes."
Yes. That is indeed the point. I would use the closing phrase of a certain youtube botany channel, but this would be a bit too blue to leave the comment in place. But I mean it.