An overemphasis on data can harm your culture through two different channels. One is the suspension of disbelief. Metrics are important, says your organization, so you just proceed to introduce metrics in areas where they don’t belong and everybody just ignores the fact that they are meaningless. Two is the streetlight effect. Metrics are important, says the organization, so you encourage your engineers to focus disproportionately on improvements that are easy to measure through metrics - i.e. you focus too much on engagement, growth hacks, small, superficial changes that can be A/B tested, vs. sophisticated, more nuanced improvements whose impact is more meaningful but harder or impossible to measure.

So using that hook of “simplicity”, the best advice for “doing agile” is: Read the manifesto Figure out what makes you happy. And do that.