I Only semi-agree.

To truly understand if your product has hit the mark, you need to have the metrics/analytics to be able to assess those factors, look for tipping points, know what to remove etc. Sure, don't do premature micro optimization.. but massive optimization to get product market fit is still a form of optimization that needs to be done, for example, A/B testing different landing pages to discover what people are actually looking for, each page with different subsets of 'features'.