Fingerprinting doesn't differentiate between visits and unique visitors - why?

Hi,

it seams that disabling cookies results in not having a difference between visits and unique visitors while the Matomo FAQ say fingerprinting is being used for that purpose when cookies are disabled. But when I disable cookies, the numbers for visits and unique visitors are exactly the same. Any ideas why this is or what I can do to get unique visitors without enabling cookies?

Thanks and kind regards
Franz