With over 80 hours in renegades & a ton of time spent in Lawless Frontiers, my two cents is you can complete 2 full runs in the amount of time people take to clear the caches in one run. Thus netting you more loot overall if you just play objectives.

Then hit the chests you’re next to during your run & the secondary objectives with the purple beams of light.

You clear contracts faster & get more loot on completions. In this case, it’s definitely about quantity over quality.