We cannot insert "column names" as URL variables for:
Go to a custom destination → URL values you can reference
Only variables we can use are "value of columns" or "dashboard filters".
This especially matters when we use pivot tables, because they don't allow us to set click behavior by columns, while simple tables allow them. We cannot set different destination to each column of pivots.
If we can use "column names" as URL variables, we can set correct custom destination URL on each pivot column.