Do I Need to Create Separate Users in the Control Panel to Protect Other Sites?

When hosting different sites on a virtual or dedicated server, it is recommended to create its own user for each site.

In the future, access rights to one of the sites may be transferred to third parties. For example, to optimize or fill the site. In this case, all other sites will be protected from intentional or accidental actions of third parties.

Also, the creation of separate users increases the level of protection against hacker attacks. If one of the sites is hacked, other sites will be protected. Since the user who administers the hacked site has access only to his directory.