Because you really only need the body of your blog post on the post page itself

bloggerPostBodyTruncationFragment.xml

<!-- 
Yep, I use blogger for my blog :) 
All the examples I found online used CSS, which still renders all the content and slows down the page loading
Making this change will allow you to increase the number of posts on the page without a huge page size
-->
 

<div class='post-body entry-content' expr:id='&quot;post-body-&quot; + data:post.id' itemprop='articleBody'>
	<b:if cond='data:blog.url != data:post.url'>
		<data:post.snippet /> <!-- only show snippets if not on the post page, or just delete this element to skip it entirely -->
	<b:else/>
		<data:post.body/>
		<div style='clear: both;'/> <!-- clear for photos floats -->
	</b:if>
</div>