OK; this view works for UIDs, now to try to make it work for usernames

Generating path aliases for all these seems ill-advised, many won't have data, so why create the path?

config/sync/views.view.blogs.yml

@@ -226,24 +226,30 @@ display:
     position: 3
     display_options:
       display_extenders: {  }
+      path: blogs/%
+      display_description: 'Blog posts listings for each user.'
+      relationships: {  }
+      defaults:
+        relationships: false
+        arguments: false
       arguments:
         uid:
           id: uid
-          table: users_field_data
+          table: node_field_data
           field: uid
-          relationship: uid
+          relationship: none
           group_type: group
-          admin_label: 'author'
-          default_action: 'not found'
+          admin_label: ''
+          default_action: default
           exception:
             value: all
             title_enable: false
             title: All
-          title_enable: true
-          title: '{{ arguments.uid }}''s blog'
-          default_argument_type: fixed
+          title_enable: false
+          title: ''
+          default_argument_type: user
           default_argument_options:
-            argument: ''
+            user: false
           default_argument_skip_url: false
           summary_options:
             base_path: ''
@@ -261,25 +267,9 @@ display:
           validate_options: {  }
           break_phrase: false
           not: false
-          entity_type: user
-          entity_field: uid
-          plugin_id: user_uid
-      defaults:
-        arguments: false
-        relationships: false
-      relationships:
-        id: uid
-        table: node_field_data
-        field: uid
-        relationship: none
-        group_type: group
-        admin_label: author
-        required: false
           entity_type: node
           entity_field: uid
-        plugin_id: standard
-      path: blogs/%
-      display_description: 'Blog posts listings for each user.'
+          plugin_id: numeric
     cache_metadata:
       max-age: -1
       contexts: