That actually doesn't prove anything of the sort. It lends no credit to your argument at all really.
Yo
How can you explain both Christopher and Soleiyu fight each other with a whip ? Both are using the Vampire Killer, maybe ? What's the hell....
Just play old games, and you'll see that the Belmonts are using many whips during their journeys to Dracula : Chain Whip, Leather Whip, MorningStar, Flame Whip, etc etc....
And the Belmont's main weapon has been called the Mystic Whip so many times...
Belmont's ability is to fight with whips, just think a little more, for one time.
All the Igarashi's LOI' Vampire Killer story is a stupid plot for kids. Definitely.