Why are the columns stock, free stock not filled in the search results?

If the field "Restrict access to branch" is not specified for the user (extra -> users), certain fields will not be filled in the search results screen of the product maintenance.
These include the fields for stock and available stock.

After all, which stock should be displayed when there are actually multiple branches present.
But even in the case of one branch, this value must be specified to fill these columns with a value.