Why did Marvel make Spider-Gwen a love interest of Miles Morales, instead of giving Miles an original love interest?

This is a very long and deep topic for me, I could discuss it forever, so do you think it made sense for it to be like this for Gwen and Miles? Couldn't it be any other way?

Why did Marvel make Spider-Gwen a love interest of Miles Morales, instead of giving Miles an original love interest?
Why did Marvel make Spider-Gwen a love interest of Miles Morales, instead of giving Miles an original love interest?
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