Music and Pearlshipping

You can't really say music doesn't count. They reflect on the writers' intentions and since it kinda was a canonical song from the creators of the Pokémon anime.

You have to ask yourself, "Why was this song written? What was the purpose?" Everything exists for a reason.

Yes, a song like this wouldn't have been made without a good reason. It's a powerful symbol and describes the strength of their bond in the anime. Without it, one simply would have to look closer to come to pretty much the same result.

All right. But what about "less direct" Ash and Dawn songs such as the movie endings? Can we really claim movie endings as solid Pearlshipping hints? What if someone says that movie endings don't explicitly mention Ash and Dawn and that they just resemble a general couple/person? Or what if the "Kimi no Mune ni Lalala" final DP ending is taken as just any ordinary girl in love? The writers' 'intention', if at all, for the song to be about Ash and Dawn is much less obvious with High Touch.

Well I guess ONE (Movie 11 Ending) actually is a direct reference to Ash and Dawn because it mentions the flower petals, but that's it. 

I think if they are Rejecting Songs as valid hint for Pearlshipping It just solidify the ship itself.

Besides like others said High Touch happened even before the Song Came out (The way they support each other) (Helping Each Other) (High Fives even before the song) It's just actually telling their relationship throughout the series(and their relationship already been there even before the song came out)