To be honest, this question or statement is perfect for discussion. In fact, there has been quite a lot of debate about the concept of neurodiversity since Judy Singer first used the phrase in 1997.
The main arguments for the term 'neurodiversity' revolve around its apparent inclusivity. For example, it refers to 'difference' and 'diversity' rather than measures of 'normality' or perceptions of 'ability/disability'.
Its main criticisms come from its apparent exclusion. The argument posits that ND is a concept made by people with a voice, largely for those people with a voice, and it sort of excludes individuals whose 'difference' is 'disability'.
Yet, others will say that neurodiversity includes disability just as any type of diversity includes people with disabilities.
Furthermore, historically ND really arose out of discussions about autism. It was then generalised to include a much larger range of neurological differences. Again, arguments are presented to say that generalisation of the application of the term weakens the concept. For example, some people will refer to certain mental health conditions as examples of neurodivergence, but exclude other MH conditions.
Furthermore, some people who are not 'neurodivergent' may not identify as 'neurotypical' and may object to being categorised as such.
In conclusion, after offering a lot of unsupported and unreferenced opinions, I would suggest that neurodiversity is a useful term, which helps us to avoid using loaded terms such as 'normal/not normal' . It is a useful concept which allows us to focus on diversity rather than (just) disability, and it still remains separate from the medical model of disability. Therefore, whilst it remains useful, I suspect it will remain used for a good few years to come.