Papa Song's words made a lot of sense. The main reason why Song Shuhang wanted to 'show off' in front of his family was to make them believe in the existence of 'cultivation'.
Now, both Papa Song and Mama Song were in the process of believing. Their bodies had faithfully relayed the information that 'cultivation is real' to their brains, and their brains were slowly processing and confirming this information.
In this situation, there was no need for Song Shuhang to 'show off' again.
In fact, if Song Shuhang forcefully continued to 'show off,' it would only add to the burden on the minds of Papa Song and Mama Song. At this point, what they needed was not more evidence, but some time to digest the information and think calmly.
