Worm & sector steering gear box?

Worm & sector steering gear box is equipped in my VW Air-cooled Beetle 1302, not Rack & pinion.
Because of keeping lubricant thin layer on slipping surface, gear backlash of former is wider than the latter if compared. Physical construction does so, then the former one is inferior to the latter?
Most of the recent steering gear box is so designed as Rack & Pinion style with power assist?
Careful checking on the steering construction in my Beetle, small but effective steering dumper is connected with controlling arm, this is nothing but the buffer to avoid the shock, vibration and waving including keeping the steering position at the position, so to speak keeping the stability at the same time. Also, small rubber shock buffers are connected in the construction, a fluffy idler arm too.
The construction and buffer parts are designed, tried so many times and decided by the factory engineers, probably their great endeavor should be above words and our imagination.
Even a changing the rubber part with different physical property later by an user must appear disguise completely spoiling the best balanced condition at all, this is why I insist on replacing any parts into genuine ones in stead of the third party products.
The final production is the result of the best efforts to the bleed by the production company at that time. The workmanship by the engineers should be respected without any argument, however old story it might be.
So, it is no use to judge the mechanical part only, steering gear box comparison, because the vehicle's taste of ride should be done as the whole machinery total balance as a matter of fact.