As someone who has spent A LOT of time getting certifications, this is a question I ask myself a lot. In the past, I was all about them, in some part because I had the time and resources to do them and less so because I thought they were the key to big career or knowledge gains. These days, I recommend to newer folks in the field to limit caring about certs and focus more on the prize (practical learning and real experience). Anyways, thought this was an interesting read.
Yes, the cert is a way to get knowledge in a new field, and only do more about the same information if there are other certs related to the same info but on more advanced topics, else work experience will give you a lot of expertise.