I’m not positive I’m understanding your term naturalistic but no neuroscientist would say “we are just neurons”. Similarly no neuroscientist would deny that neurons are a fundamental part of consciousness and thought.

You have plenty of complex chemical processes interacting with your brain constantly - the neurons there aren’t all of who you are.

But without the neurons there: you aren’t anyone anymore. You cease to live. Destroying some of those neurons will change you fundamentally.

There’s no disputing this.