Social Settings on the bottom of contribute pages
I believe key here is that what CiviCRM inserts are social media 'shares' - not social media 'links' or 'follow us'.

for social media links we add https://www.drupal.org/project/social_media_links
(I'm sure in wordpress land there are plugins that work exactly like this drupal module).

Social media links behave as you asked in your question: you must configure which icons you want and add their targets (links to them). These targets typically are your twitter feed; your linkedin page; your etc.