I find it generally a place to get a decent idea of what peoples general opinion of a character or a piece of media; just be aware there is bias. Though pages' like Kishi's are too be avoided because it clear someone making sure only a certain message is seen. Though in a way it still shows a general opinion. The nH fans that support the ending are still insecure about it. Honestly, if it was me I would have put all the ending bits in the YMMV page and instead used the interviews through out the years to fill the page with all the tropes kishi says are in his writing and try to make sure he came out as favorable as possible while still acknowledging his flaws.
Instead that page is just, "Hinata was always the true intended love interest ALWAYS Sakura was too hated too be with Naruto wait she was never considered a chance to be with him because it was always our princess goddess queen Hinata! HA HA HA AHAHAHAHA AHAHAHAHAHAHA!!! Oh and he really liked the video games and he forgot to really do a lot with certain characters which he somewhat blames on his editors."
Also the fact that interviewers keep asking Kishimoto about it means that it is the question they feel the fans want an answer to.
Pretty much this. Casual fans do not edit wikis, since doing that requires a higher level of investment than simply consuming the media. As such, they are always going to have some bias when it comes to their information. For real, I once saw a infamous Edelgard defender edit her fanwiki page, removing statements from the director that her path leads to tyranny while trying to paint her in a positive light, even using fanon to do so (ironically, TV tropes dismissed that specific bit of fanon, saying the game completely debunks it). And once those biases are in place, it's easy to gang up on someone trying to argue otherwise. You can have canon on your side or even hard facts but their narrative is in place and being spread, informing people less informed and even give them a bias if they do decide to check it out.