Restrict a column visibility on a template and have setting maintained for child board

Description

We would like to restrict the visibility of columns in a template (you can do this now) and then when you create a child board from the template, only the owner of that child board should be able to see the columns. (Restrictions are not flowing into the child board)

What are you trying to achieve

Business Case: We have many columns in repeatable projects that we don’t want Guests to see, and manually restricting each column takes a lot of time for the project manager.
In our opinion, guests should always start with zero access and the project manager adds access as they see fit. Most project managers limit what guests can do to very little, which takes excess time. It would be best to allow them to just add what is needed as they see fit.