The singer told Yahoo that she feels the annual talent show's output leaves less room for creativity in the Top 40.
"I don't think it has much of a positive effect on the landscape of the charts," she said.
"If you have less and less room to foster the talent of people whose first concern is music and creativity then we are not going to have a creative industry anymore."
When asked if The Noisettes would consider appearing on The X Factor, Shoniwa admitted that "a gig's a gig" and she would perform in the hope of educating viewers and contestants.
"It might inspire somebody who is on that show who probably doesn't even know what a band is or what goes into a band," she said.
"For example, One Direction, I think people are calling them a band now. If an actual band went on The X Factor and [a contestant said] 'Oh I really like that they've actually tuned up their instruments', that would be great - you never know who you are going to inspire."
Shoniwa added: "One thing I would object to is being the judge of someone else. I don't think that it's any one person's right to decide whether they are good or bad.
"I just think that it's a little bit too far and it's quite reflective of the narcissism of the judge based on their tastes. Who is there to judge others really? Let real fans be a judge, not the people who are at the end of a TV screen!"
The Noisettes are due to release their third album Contact on Monday (August 27) and will play Jamie Oliver's 'The Big Feastival' next weekend (September 1 and 2). The second single from Contact, 'That Girl', is out now.
Listen to The Noisettes' 'That Girl' below: