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Yeah it has helped me in my career.
I did the most difficult aws certifications but turns out it doesn't matter - even the intro certs are seen as very valuable by hiring managers, the ones where you just learn the name of services.
Heh yeah the AWS ones are just product placement and a tiny bit of configuration soup later on.
It's actually annoying. In aws world, only aws solutions are even mentioned. I notified only after certification that there are many valid use cases for not using Ami's for example. Aws pretty much recommends making a new ami for every little change you make on servers, and if you have a fleet of hundreds of servers and want to change a small config on them, that means building and replacing hundreds of Ami's.
Compare that to ansible that can quickly and in parallell make the change everywhere in seconds.
The immutable infrastructure thing sounds really good in theory but has flaws in practice. The benefits are there but at a big time/money/complexity cost.
I learned terraform and that helped. But I started in on and ansable/chef.