So, there's a couple of things to unpack here. To clarify, we have a lore based reason behind this, as well as a personal one.
Firstly in regards to it being a change for selfish reasons, I think that unfortunately any change we are going to make is, by nature, a selfish one. We're making our own version of Bionicle, so no matter how you look at it you'll always find that the decision that we make will stem from our own desires. Making Lewa female is just as selfish of a decision as moving the location from Mata-Nui to Artahka (the name of the island in our reboot).
This is why I wanted to understand why you thought it was so important, versus some of our other changes that most people seem to think are fine.
We want our Bionicle to be recognizable, but different. We don't want to just tell G1's story all over again because... well, its already been done and that's just kind of boring. As fans of G1, we always thought that the number of male Toa compared to the number of female Toa was strange. Gali, as a character, was always given archetypal roles of being "the mother", with female quirks that have been done millions of times before. We felt that Gali was limited by being the only girl member, because naturally writers tend to attribute anything that's feminine to her.
Your solution of making them all gender-less works, however I think it's a concept that makes them less relatable to the audience because humans do have genders. We want our characters to be as relateable as possible, hence why we've given them a bit more human characteristics (eating, sleeping, etc.).
And I can assure you, no one in TTV made this change just to ship characters together... that's a really silly reason to change a characters gender.
Now, from a lore perspective it's important to realize that this Lewa is not the original Lewa, but rather a new (female) character who has taken over the mantle the original left behind. The original Lewa was male.
Also in regards to our reputation, I think if people want to get hostile and try to spam us and insult us just because they don't like our ideas, that's their prerogative. We aren't about to stop speaking because someone wants to bully us into silence. That is true censorship, and these people are truly reprehensible.