A document created using a template will have access to all of these features and a large part of your job in creating a new document will be done for you if your templates are well thought out.
Hackers can immediately write bots to automatically crawl the web and exploit these vulnerabilities.
Also, more importantly, updates can be critical for security.
So waiting even a few days for to perform a critical security update can put your site at risk.
If you allow editing to the drop-down list, other people can change the list options to meet their needs.
Note: If content controls are not available, you may have opened a document or a template that was created in an earlier version of Word.