I guess it's really a matter of opinion. Word count has never been a concern to me, other than whether or not I have too many words when I finish a book. It's not something I think about each time I sit down to write and I certainly don't check my word count per day - ever.
Having said that, we all need a way to measure ourselves when it comes to a successful day. I simply like to write a chapter with each sitting (note I said 'sitting' not per day. I firmly believe that it should be done in one shot in order to not lose your momentum or train of thought) and with that I'm happy. I don't feel like a failure if I don't reach a certain amount of words and in my opinion, neither should you.
The problem is that if you set your sights on so many words per day, what ends up happening is it can become your focus more than the actual writing itself. It also might end up that you create a 'wordy' piece of writing that you'll have to cut from later on. Also, a lot of words doesn't necessarily mean it's going to be pure gold. It's kind of like the girl who wears a lot of makeup; sure, some women will do it to perfection and walk away looking like a model, but most of us will end up wiping half of it off because we don't want people to think we have the makeup gun stuck on 'whore' (and yes, this is a Simpson's reference 😉)
The bottom line is that I don't like to see any writer put stress on themselves to meet some crazy target because it actually can make writing feel more like work than a project that they love. And if that's the case, what's the fucking point?