Meh.....I don't think the MTA is totally useless. I think some of the MTA certs can be useful at landing entry-level Helpdesk/Desktop support jobs at companies that are Microsoft shops.
Especially if you sell the skills & knowledge learned from studying for MTA certs (i.e. enableing/adminstering/configuring/troubleshooting Office 365, Active Directory/Group Policy, Remote Desktop, & etc.) in your resume & interviews.