While Microsoft encourages the use of the Media Creation Tool, you can directly download Windows 10 ISOs from their official servers. However, you need to know the exact version (Home, Pro, etc.) and architecture (64-bit or 32-bit) you require. The direct links are usually provided for volume license customers or for Insider Preview builds.
Since the ISO is pre-compiled by a stranger, it could theoretically contain a keylogger or remote access trojan. kernel os windows 10 iso link
It disables a wide range of standard Windows features, such as event logs, WebView2 , and various background services, to free up system resources. While Microsoft encourages the use of the Media
For enterprise environments and organizations with volume licenses: such as event logs