Prevent subscribers/members from wp-admin

A user of my new FC community helpfully scolded me for allowing him access to wp-admin by default, as well as author archive pages. I found some snippets one can add to a child theme to help lock down an FC site:

https://wordpress.stackexchange.com/questions/93843/disable-wp-admin-console-for-subscribers#:~:text=You%20can%20remove%20the%20Read,admin_init'%2C%20'remove_read_wpse_93843'%20)%3B

https://www.malcare.com/blog/restrict-admin-access-on-wordpress/