Planck scale units aren’t known or typically assumed to be minimum units. They’re just the units that come out of combining some fundamental constants and are thought to represent a scale where the effects of quantum gravity have too much effect to be ignored. They just represent a theoretical limit to the validity of our current models.
Human knowledge will continue to push these boundaries as long as humans still exist, but it’s arrogant to think our current human limitation is a universal limitation.
Especially when Equifax leaked nearly half of all Americans’ names, social security numbers, addresses, birthdays, and driver license number in 2017. That info is just out there and we can never remove it.