The 5D mk 4 has been used and abused by many wedding, photojournalists, and war correspondents. Pro's don't baby cameras like us mere amateurs do. The camera was built for pros not amateurs, translation: sometimes abusive and demanding handling and environments. So below is a copy and paste as a result of a quick search I did.
"Yes, the Canon EOS 5D Mark IV was a popular choice for war correspondents and photojournalists due to its features and build quality. Its robust build, weather sealing, and fast burst speed made it well-suited for capturing fast-paced, often harsh, environments. Its high resolution and good dynamic range also provided ample flexibility for post-processing in varying lighting conditions.
Canon EOS 5D Mark IV | Camera Review - shanelongphotography.com
While not as revolutionary as previous 5D models, the Mark IV was a capable all-rounder that professionals and enthusiasts found reliable for a variety of uses, including photojournalism. The Mark IV was a good choice for capturing both still images and video, making it a versatile tool for journalists needing both capabilities.
The EOS R6 Mark II is now considered by some to be a better choice for photojournalism and documentary work. However, the 5D Mark IV was widely used by those in the field and continues to be a strong option for those requiring durability and speed."