Shift left does not mean developers take over responsibility for security, it means they become part of the process and they share in the responsibility. Now more than ever we ask our developers to know and build in a wide range of technologies so we can't leave them on an island to secure them as well. Infosec needs to be a cooperative partner in DevOps.
(*please note, the quote in the screen shot was taken from Twitter and does not imply the tweet's author in any way endorses this post or the links contained within)
Check out our DevSecOps Hub to deep dive on how InfoSec meets DevOps - and I'm always happy to hear what you think in the comments.