I remember being finger printed 25 years ago at school.
Im not that worried about finger printing, but dna testing is more worrying.
There could be mistakes made. I heard one story of a guy (on the radio) who voluntary gave DNA when there’d been a crime commited locally. He was arrested after he was told he was a match. He could do nothing to convince them he hadn’t commited this crime, only maintane his innocence. It was only when further DNA tests were done that he was cleared. This shows mistakes happen. This incident gave him months of worry, as they bailed him and he wasn’t cleared for 18 months.