A simplistic statement can often be seen as lacking depth or nuance. Some synonyms for this phrase might include oversimplified, reductionist, superficial, shallow, or basic. These terms all suggest a lack of complexity or understanding in the statement being referred to. Other possible synonyms could include facile, elementary, naive, or unsophisticated. Ultimately, the choice of synonym will depend on the context in which the phrase is being used, and the speaker's intention, tone, and perspective. However, all of these synonyms suggest a similar idea: that the statement being made does not fully capture the complexity of the issue at hand.