It doesnt exist because you have the option of adding weight to the bar.
Even Pavel Tsatsouline has a slow twitch hypertrophy protocol for us to follow. You know, the guy who values low rep work over everything else? The victor sulianov slow twitch hypertrophy protocol put on over 25 percent on the max lifts of late intermediate trainees who would later go on to become elite powerlifters, IN A MATTER OF 8 WEEKS.
So doing work in that rep range certainly does have strength benefits.
The barbell programs from the US didnt factor that in because the option of adding weight was always available.
However in the soviet union, a country far more advanced in terms of sports science, did recognize the value of light weight work for promoting strength and hypertrophy using barbells. That was the Sulianov slow twitch protocol in the flesh.
So, in other words, no disrespect but, one of the most celebrated barbell strength programs, aka the sulianov slow twitch protocol, uses 30+ rep max weights. So I must say, sir, that I cant fully agree with your statement.