I don't think there is anything wrong with being able to perceive tulpas/hosts in two categories: personified or as a construct. You can take a look at them from two perspectives, and it doesn't dehumanize anyone, because it's just a tool of perception. Perceiving "tulpa" (as a part of the mind, as a general construct not a specific tulpa) as a construct allows you to look at it more abstractly and analytically, which allows more of a high level thinking about tulpamancy . It doesn't mean that you gender a tulpa as "it", you just perceive it differently, for a moment. I should clarify that for tulpamancy practice I believe that it is better to perceive a tulpa using their chosen gender/pronouns to personify it, it will only make the tulpamancy experience stronger, and I would never perceive someone's particular tulpa as an "it". The "it" is only for abstract thinking about tulpas in general.
Thinking about it, there is nothing in my mind that I wouldn't be able to call "it" when thinking abstractly.
Me, you, anyone, at their core is basically "awareness", everything else is just something awareness just absorbs and identifies with, but for some reason people don't have a problem to use "it" when talking about "awareness".