Because a VC that is more concerned with the type of phone you use than your product/service/company is probably a VC you should stay away from.

Imagine explaining to investors in your VC - "You know that XYZ company that just IPO'd for several billion dollars? Yeah I passed on their series A because the founder didn't have an iPhone despite the business itself being really solid". If I was an investor in that VC I'd sue the partners into the ground over such trivial bullshit.

If a VC finds importance in a specific song and dance you find silly, I would take that as a signal of their market and technology understanding.

Some topics can be deal breakers, you don't have to marry the first VC you talk to, or court them all.