A client expresses that they believe Drupal is 'limiting SEO' for their 'minimalist' site.
My reply:
I am not sure why you are imagining that Drupal is limiting your SEO. I suspect Drupal is one of the best platforms for SEO, whether a site is basic or beyond. It just needs to be configured appropriately and then standard SEO practices applied on top of that layer.
The limitations of your site in Google are in no way a consequence of you choosing Drupal.