Gravel bars, like the ones on your Mazama, allow for better control on poor surfaces since you can hold the drops and have a wider setup. That slows steering down for more stability. It also places the hands palm down which allows you to hold the bars softer and still maintain control(no death grip needed).
Unfortunately, gravel bars like the Mazama's, are tilted incorrectly. The drops are supposed to be about level with the ground, but they are often sold and used with the drops pointing down to the crankset and ground. The reason the drops are supposed to be level is that is the primary spot for your hands, which is also why a lot of bikes have tall stack heights- to allow the bars to be higher since the drops are the main hand location.

This ideal designed setup is obviously not used as often as intended since the hoods are where most ride.

To me, good bars allow for extended use on the hoods, drops, and tops. Too much flare and the hoods are no longer a useful spot for extended hand placement. The Salsa Cowchipper is an example of an ideal gravel bar for me- the hooks angle out so the drops are wider, but the drops are mostly still parallel with one another and dont then flare outwards. The hooks are really nice as the bend allows for the ramps to be used like on a traditional road bike so the hoods are for the most part level.
Best of all worlds.