Hi @jasonb4u2,
Good question however before I answer it, let me clarify the terminology that is used here so we can be on the same page.
So taxonomy is a type of terms or as official WordPress Codex states:
basically, a taxonomy is a way to group things together.
You do not manage access to taxonomies, it is simply not possible. You manage access to terms of specific taxonomy. For example, post categories are category taxonomy and you can create category terms on wp-admin/edit-tags.php?taxonomy=category page.
To make your head spinning a bit more, each taxonomy has to belong to specific post type. For example category taxonomy belongs to post post type.
With AAM you can set default access to all your terms of any specific taxonomy or you can manage access to any individual term. AAM also takes in consideration hierarchical nature of terms and inherits settings from parent terms. For example if Term B has parent Term A, then if you do not explicitly define settings for Term B, they’ll be inherited from Term A.
In you case you can set default access settings to all terms and all your terms will inherit settings from default so you do not have to set access settings 3000 times.
I’ve started the Youtube channel where uploaded long time ago few videos. They are not perfect however I’ve just got new equipment and will work on better quality video tutorials.
Keep me updated. If necessary, I can help you to setup access.
Regards,
Vasyl