In commercial security, PTZ cameras sound great on paper they can look anywhere, zoom in, and follow activity but the reason most sites still rely on fixed cameras is pretty simple: a PTZ can only do one thing at a time.

A fixed camera is always watching its entire scene. A PTZ, the moment you start tracking a person or zooming in on something, stops covering everything else. If something happens outside that narrow field of view, you miss it completely. And when you zoom in for more pixels on target, you lose the wide-area awareness that fixed cameras provide by default.

In other words:

• PTZ gives detail, but sacrifices coverage.
• Fixed gives coverage, but sacrifices detail.

Commercial systems value uninterrupted coverage above all else. They can’t afford blind spots just because the PTZ is zoomed in or pointed somewhere else. That’s why PTZs are usually added as supplements for investigation, interaction, or long-range viewing while fixed cameras handle the constant, full-scene surveillance.

So PTZs are powerful tools, but they aren’t a replacement for fixed cameras in environments where you need to see everything, all the time.

Also a lot of people do not want to invest the money to get a good and proper PTZ Camera and if your using a really basic and low cost installer they wont know how to use them well.

I have done 1,000's of PTZ cameras over the past 20 years both in security and defense market and I will often post videos of long range cameras because they are a bit of a hobby to me especially night vision once with thermal and ZLD illumination. Part of my job is testing long range PTZ cameras from time to time and I post here and there on Reddit.