I get what you're saying.
There's so many possibilities with lore, social systems, sexuality and culture for races that it's sad so many games take the approach of just thinly layering some other flavor ontop of "normative human" stuff.
I have no problem with Galka being a race of dudes who just reincarnate outta the ground instead of mating or w/e. Brings up interesting questions on how population grown or stability works with them and how their culture operates as well as their views on sex and so on. If Viera were just spat out by advanced life form trees as a means "to protect the forest" and only looked like pretty female humans with bunny ears because the tree(s) figure the greatest threat is human looking races and, through trail-n-error, found that human looking races tend to react poorly to things that don't look human like then that would be some cool ish. Basically, if Viera were like the plant race in GW2 (all come out from a Great Mother Tree, can have sex but can't have babies, come out fully grown, made to imitate humans and are pansexual regardless of what gender they were birthed to imitate and even have some form of a hive mind) but only looked female and were just an amalgamation of small-forest-animal features on a 98% human base I'd accept them being female only without problem.
IDK if that's their lore in other games but in this that's not how they are. Regardless of their origins they grow from childhood, have genders and procreate through sex. Given this ... I personally don't have a problem with Male Viera being in the game. I personally couldn't care less if they were added as I think the whole of the race adds next to nothing that couldn't have been achieved with a much-needed graphics engine and CC update (as seen in PSO2 NGS) but as the lore is I don't personally see the NEED in preserving their hidden nature to this extreme.
It begs the question of "why can't a Viera female who left get preggos in La Big City and birth a son?". Like, I know there's convoluted lore junk about how people see mix race procreation as "taboo" (not mixed race relationships/ sex but child making ...) which makes it rare, but we do know that in the rare cases where it does happen the child normally comes out as w/e race the mother is (mix-race babies like the half elezen girl are rarer). If their gene stuff works anything like RL the birthrate of females compared to males would be the result of male Viera naturally making far more X sperm than Y sperm ... which would mean that a Viera that left the forest and did the do with a male of a different race and got preggo from it (not a common thing, but it does happen for other races) would have a far better chance of making a baby boi than she would with a Viera male at home. Ultimately this means that you can have a population of Viera who were never raised in the forest because they were the product of some lucky taboo procreation and that population could have males that don't adhere to the practices of the males in their homeland because they were never raised there.
TLDR: Long ramble saying that if they had actually made it a mystical, full on fantasy, magical race that's just all women who don't have babies like normal people then yeah, I'd accept that and support them not adding males. But they used conventional %^%# with genders and such in a world with rules that ALLOW for a possible situation where male Viera could be a thing seen by others sooo IDGAF if they decide to show em. (Though I think the whole race is a waste personally)






