The “hypothesis presumes that athletes in interactive sports are much more likely to play and practice against right-handed opponents. As a result, these athletes develop both greater familiarity and highly specific skills to anticipate the action outcomes of their right-handed opponents via attunement to crucial perceptual information”
As a person with severe hemophilia in the third world, where the condition is very under-treated (no prophylaxis, very little clotting factor and sometimes none), I've grown up facing this issue with the dominant arm being out of commission due to a bleed for days at a time. I gradually learned to do almost everything with the left hand: brush my teeth, shave, eat, shower, type with one hand (autocompleting IDEs help), even drive a stick shift (using the right hand to hold the wheel briefly while shifting, technically illegal I'll admit).
It's not that difficult to adapt. The barriers are mostly mental because it feels awkward at first. There are some dexterity issues but if you don't mind going slowly, you can get by.
Just sharing my experience, not meant to undermine the challenges faced by left-handed individuals in a right-handed world.
(although of course unlike your example it doesn't involve reaching across one's body to use it)
Ah, let me add on to this from the other perspective.
I live in a country where cars are driven on the left side of the road. ie., the steering wheel’s on the right side, and the gear shifter is operated by the left hand.
And until about 5 years ago stick shifts were very common (automatic transmission was considered a luxury feature only available in higher variants).
I’m right handed. I have no trouble at all shifting gears with my left hand. Feels very natural to me.
I have never driven a left-hand-drive vehicle and in my imagination it feels weird. Like, operating the clutch with the left leg, and the gear with the right hand feels weird. In RHD cars the gear is in the same side as the clutch.
But anyway I know lots of people who drive LHD cars when aboard, and they have never complained.
So I think at least for driving it’s just a matter of getting used to it.
As a left-hander who uses a trackpad or a mouse with their right hand, stick shifts too at least in America, can use both left and right and bat from either side switch handed, and in a fight can use the right hand just as much as the left hmm maybe that’s why left-handedness is still around very good in a fight sword play, tennis, boxing, and even wrestling. In certain fights the first few blows are everything towards survival at least back in the day.