Why is better to put the link on the first comment? (Facebook)

Hello,
why the fanpage put the article news in the first comment instead to add it on the post itself?
Just a comment gives more views to the past and improve engagement rating? Maybe the hope is the people starts commetting if they put the link in the comment section?
What are the benefits?

Thank you

To avoid shadow ban, adding link direct onfacebook post and twitter 7/10 time leads to shadow ban and your post will be 80% limited, that most of your friends, followers etc won't see such post

So is always best to make your post first without a link and add link on commention

You can follow up with more comment on the comment section, by so doing your post will reach quit a good numbers of people

That is the reason. Cheers

Because Facebook only wants users to interact and stay the longest on their platform. That's why Facebook won't like us redirecting customers to another platform. Therefore, articles with external links will have more interaction than regular posts. Instead, you can attach the link in the comment section to limit interaction from Facebook.