Love this - its not better/easier/faster if you don't do it lol - good one
I'm pretty sure that nothing shows you what 'correct exposure' is as that's a judgment call depending on the look you're after
Histograms can tell you what's blown but not where its blown in the image, hence blinkies. In-camera metering or external won't tell you if part of your image will blow either, but if your aim is not to blow something out then blinkies is the only way to be (close to) sure where the problem lies for you to then decide if it is a problem or not
As often happens for me in shooting Landscapes & Weddings, the camera gives a reading, the blinkies confirm if its close to how I want it to record in a test shot and I adjust to get my version of a 'correct exposure'
Brains not kit decide
And let's not even get started on low/high key landscapes/portraits and metering lol
Dave