Not necessarily. After all, it is acceptable to post evidence of an interaction with a human
https://forum.inaturalist.org/t/you-know-youre-seriously-into-inat-when/1992/545
https://forum.inaturalist.org/t/you-know-youre-seriously-into-inat-when/1992/552
And we accept pictures of the host as evidence of the virus in iridescent viruses in isopods or (as OP said) tumors on deer.
With the caveat, as @fffffffff said, that if it isn’t a distinctive symptom, then there needs to be additional corroborating information and not just a picture of the wart.