I don't either.
Stock tie rod ends "absorb impact on more than one axis" too. Actually I don't see any functional difference- it's like "What is better, a bolt or a stud?"- except regular tie rod ends are often greaseable which is a good thing, and their innards are more protected from filth.
And, where do you find the nice tapered bolts that fit in the tapered holes?
Most effective way to ease Armstrong steering is to pump up the tires; then see that everything in the front end is tight and lubed up; then take weight off the front (rear engine cars have such awesome light manual steering).