It's not about having access to server logs, you need tools to make business and technical decisions and no tool will use server logs to show you how users interact on your app or website.

What's the privacy concern if I'm tracking on what pages my users visit? I'm not sharing those with anyone.

Small business owners like myself are hurt by these things, I can't afford to pay 4-5 figures to a developer to build a tool to analyze my server logs and won't give even 5% of the quality of data analysis Google Analytics or Mixpanel gives.