Most "key lists" are not text files. They are executable files (.exe), password-protected ZIP files, or Word macros. When you run them to "reveal the list," you actually install keyloggers, ransomware, or crypto miners. Since Office 2007 is often installed on older, unpatched machines, these viruses will spread easily.
If you do find a plain text list of 100 keys, you will spend 3 hours typing them in manually, only to find that 99 are blocked by Microsoft's activation servers, and the 100th is for a different edition (e.g., you have Standard, but the key is for Professional). ms office 2007 product key list
Here is the harsh reality:
In the early 2000s, some corporate IT departments maintained internal key lists for deploying Office across hundreds of computers using a Volume License Key (VLK). However, those keys are legally bound to the organization and are not meant for public distribution. Microsoft stopped supporting Office 2007 on October 10, 2017 . This means no more security updates, no technical support, and—crucially—no more legal sales of new product keys. Despite this, the software still exists in the wild, and people want to use it. Most "key lists" are not text files