Exclude taxon from observations via " Include / Exclude Ancestor Taxa"

Platform(s), such as mobile, website, API, other: Website

URLs (aka web addresses) of any pages, if relevant: https://www.inaturalist.org/observations

Description of need:
Allow user to exclude taxon itself from UI, and not by manual URL edit.

Feature request details:
It is nice feature to exclude ancestor taxa of observed species. But why user disallowed to exclude the taxon itself? For example. I want to see, what Anas species stay at winter in Siberia. I fill filters and get something like this. 95% of observations will be Mallard, so I want to exclude it. And now I have to remember (or copy) id of the specie, and add without_taxon_id=*** to the URL instead of simply click on a button in the UI, like if I would to exclude any of ancestor taxa.

What reason was to make only half of the work when you implemented the feature?

Agreed, this would be good to add to the UI, ideally with an option to select multiple taxa