Going to play the devil's advocate here in regards to 'juniors' disregarding the wisdom and experience of 'seniors'. Maybe the advice, experience you're giving is not backed up with any evidence? They may be taking a analytical and evidence based approach and simply choosing between you're advice or a celebrity tweeter as both lacking any evidence and thus being both equal. Possibly the silver bullet gives them a upper hand of using the latest marketing trends for reciter's to land their next job that pays 10K more?
I find it a bit of a juxtaposition that on one hand you're undecided about more engineering approaches and certification to building software. Then on the other hand you're frustrated that your advice or experience is not valued? To me it seems like you've answered your own question why your advice isn't valued by hip new guys.
Honestly, it's difficult to back things with evidence in this field. Ever try to get someone to read a paper on software engineering methods? Before one can get them to understand the evidence or even look at the data, they've already whipped together another couple thousand lines of code to demonstrate the opposite.
Look, I'm definitely not a top %1 (or even %10) architect. But, I have had enough successes under my belt that it's statistically improbable that I don't know what I'm talking about. However, my experience is usually discounted because 'times change, and old ideas aren't relevant' as they say.
I find it a bit of a juxtaposition that on one hand you're undecided about more engineering approaches and certification to building software. Then on the other hand you're frustrated that your advice or experience is not valued? To me it seems like you've answered your own question why your advice isn't valued by hip new guys.