As a 20-year veteran SysAdmin/DevOps/BlueCollarITJanitor I find that certs are useful when they are used as a fundamental building block for building basic knowledge in a specific vendor's way of implementing their technical solution.
As an example, I cut my teeth on MCSE NT 4.0 (could have taken NT 3.51 certs at the time but stupidly skilled those to jump ahead) as a late teenager but the structured organization of the learning materials with the courses and books taught me Microsoft's ideologies and reasons for implementing and using their OS and their BackOffice (...BackOrifice at the time, kek) products and how that specific vendor wanted their stuff configured and working together. For example, the Network Essentials (aka. TCP/IP) test was useful in understanding how Microsoft implemented IPv4 in their OS and how the features of DNS, DHCP, WINS, Routing, etc. were done and could be used to build a good foundation for the network infrastructure correctly.
Now I find that after reading or skimming through some vendor's product instructions and finger-fucking the product's GUI/CLI/API to get it to do what I want it to do I'd like to find the time to sit down and read the actual vendor provided training materials to learn the product from the vendor's idealistic perspective, but alas I can't seem to find/make the self-motivation to go through the study and cert process since this day and age I just go and poke my fingers into some other product's innards to see all the gooey insides such as their APIs and database schema. One of these days I tell myself I'll go back and update my MCSE certs to whatever the new one is... any year now and get those Cisco, VMware, F5, whatever certs... For now it's finger-fucking my keyboard in PowerShell to get at the API of the next victim... err, solution.