It may be useful (perhaps even necessary) if you have to be on AWS. But it is a systemic problem however. Lot of these services have "need to launch something" sticker attached - so AWS keeps adding layers over layers and end up with something very few people understand. First comment is spot on (networking tends to be a cargo cult)! Certifications tend to be in architect's space (talkers) while the real coders (builders) who build systems hardly want to know these things.
P.S - FYI I am nX AWS certified myself, so part of the clan :)