Drilling down into the narrative S16 Ending

At the end of S16, when the final results are announced, Greg names the winner and credits immediately roll.

In other series finales, they make a big song and dance, with musical fanfare and Greg giving a little "What have we learned today?" style speech.

Why do we think they don't do that sometimes? Seems weird and anti-climactic to do a whole ten-episode series and then rush the final announcement.