As the homeowner, you can sign up with either website and correct the information. Since many people rely on the various real estate aggregators (Zillow, Realtor.com, Redfin, etc), it would behoove you to have the correct info in there. While your info may self-correct if you list your home, it may not. Do you really want a buyer thinking you have a 1-BR home when you’re trying to sell a 2-BR home?
I do get your point but IF I ever sell this perfect home My RE agent will update the information...until that time I prefer it to be just as it is - including not having a photo of our house (the photo is a Google street view snapshot of our field and the valley below).
Happy Spring!