The "mistake" happens so often, partially because "segway" is a much more straightforward spelling if one has only heard the word said aloud, that I think it will eventually become the actual way it is spelled!
Looking it up in https://en.wikipedia.org/wiki/Segue they even warn about that!
That's precisely how language changes over time. Language is not a strict set of rules. It's based on understanding and consensus, so sometimes things that are "wrong" do end up being accepted.
I suggest this as a great introduction into what languages are and how they evolve over time https://www.amazon.com/Language-Families-of-World-audiobook/...
In more forgiving of mixing up homophones, even if one of them is a registered trademark (Segway).
I suggest you yourself take a second and explore why you think being smarmy on the internet is a way of getting people to agree with you.