Acrobat Pro DC can't remove password where PDF Expert can

Hi,

For the same PDF with

- an opening password you have

- a permissions password you don't have

With Acrobat Pro DC, it's not possible to remove the opening password (will keep asking for the permissions password).

With PDF Expert, it's trivial to remove the opening password (won't ask for the permissions password, I suspect it does this by creating a new PDF?).

Now:

- why can't Acrobat Pro DC do the same as PDF Expert, as it is very handy? (or where is this option if I overlooked it?)

- what is the point of a permissions password to remove the opening password if it can be so easily bypassed?

Thanks