When using the "set variable" action I can populate any list-field into a variable.

However: if the field is of type "choice" or "lookup" and the field allows multiple values, I would assume that I could populate a collection, containing all values of my "multi-choice" or "multi-lookup" field.

However, this is not the case. Instead a choice column with multiple values creates a JSON-string suggesting collection-of-strings. But this is just a string. Similar for lookups.

Instead I have to query the list and return the result into a collection. This way I get a collection of values - why can't I get this behaviour when using the "set-variable" action?