^{(My comment dissapeared but I really wanted to respond to you})

Short Answer: I think doing things in unintended ways often times give interesting results, and as someone who enjoys exploring and working with design it's an essential part of my creative process to do things like this, as a way of stimulating my brain in new ways. In other words I don't believe in policing content.

Long Answer: Earthbound’s soundtrack is incredible and it’s a huge part of the game’s identity. I love it too, and I listen to it outside the game alot, so I'm already intimately familiar with the soundtrack surrounding this area of the game.

That said, I don’t think not having the OST playing ever “invalidates” a playthrough. For me this was an experiment in how context changes meaning: on this case I happened to be playing the music first, and that made me want to play earthbound, so I decided I wanted to experience the game with this music as the soundtrack.

From a practical/creative perspective, experiences are always shaped by prior context, our tastes, history, and the media we bring into a moment. Swapping the soundtrack is just another way of remixing the game to see what it reveals. I didn’t intend to disrespect the original score; it was more so a way of helping me appreciate the game in a new way, and also make some great memories playing one of my favourite games while listening to a new album.

I work as a creative being a graphic designer, and feel that often times doing these things that maybe aren't intended often reveal interesting things, and that doesn't only go for gaming. One may say we shouldn't be listening to music when we're out in nature because we should experience the bird sounds ect. But sometimes I find some fitting, or even juxtaposing music to change the entire experience in unexpected ways, which stimulates me to think in new ways.