I once read that the two least liked manoeuvres in driving are left turns and merging into traffic.
Left turns, I agree, makes sense. There’s inherent danger from exposing your broad side as you cut across the path of oncoming traffic.
Left turns also put you at the mercy of the volume of oncoming vehicles; it can be a long wait before you get a chance to make your move. If you’re a somewhat timid driver, you may fail to take advantage of opportunities that seem iffy, thereby resulting in an intimidating amount of traffic backed up behind you.