Chrome extensions shouldn’t be in the hands of users, no matter their title. CEO included. As a device sysadmin I feel this strongly. None of you can be trusted to vet extensions. Honestly anyone who uses vanilla Chrome has a suspect threat model.
On the rest I rather agree with you. General-purpose computers are key tools over which users should be admin. Sysadmins provide a security backstop. Full lock down is the sign of an unhealthy understanding of how the org’s value is actually created.