Exploring Theme Code – Simple Theme

I am looking at head.hbs in the theme Simple.  There is a couple sections that I am trying to wrap my head around.  Lines 31-45 look like this:

       {{#is "post"}}
           {{#post}}
              {{#if hasGallery}}
                 <link rel="stylesheet" href="{{css "photoswipe.css" }}">
              {{/if}}
           {{/post}}
        {{/is}}	
        {{#checkIf @config.custom.frontSource '==' "post" }}
           {{#checkIf @config.custom.frontGallery '==' true}}
              {{#is "index"}}
                 <link rel="stylesheet" href="{{css "photoswipe.css" }}">
              {{/is}}
           {{/checkIf}}
        {{/checkIf}}

I understand that if this is a “post” and it “hasGallery” it will load the photoswipe.css file.

Why is the next section of code not redundant?  Can the content not be a post but have a custom front font source that equal to post?  How?  I do not see anything in the settings for this theme that would allow me to select the “post” font as a source for the front font.

What am I missing?

The same source code does almost the same thing in lines 48-89 (not shown) for loading light and dark icon sets when the Gallery is present.

Thanks