Turing is an interesting piece of ice. It's sort of a Bioroid, but not completely. It's AI hate, but they can still make it through by clicking without punishment (similar to Wraparound just being really expensive.) It has an end the run subroutine that's technically not "End the run." (Take that, Endless Hunger!) It has variable strength, depending on placement.
The obvious move is to put it on a remote, where it's potentially very taxing, at 5 strength or 3 to get through. Combined with any Bioroid (or stacked with itself) they have to break something.
However, the (currently) most popular AI breakers are Faust, Eater, and Atman, with Brahman potentially joining the club (plus occasionally Knight). Faust/Eater/Knight decks are likely running D4v1d/Parasite, leaving it vulnerable to one or the other, depending on placement. Atman is rarely used at 5 or 2, and certainly not exclusively, while Shaper specializes in Code Gate breaking. Brahman has yet to be definitively proven, but likely packs Cyber-Cypher and Chameleon. Even Apex: Invasive Predator can get around it by using Prey, clicking through, then trashing it.
So no matter what, Turing isn't there to stop the runner. It's there to tax the runner, to slow them down. The upside is that while it seems designed solely to hurt AI, it actually has a decent cost/effectiveness ratio. Viktor 2.0 costs 1 more, and has 1 more subroutine, but costs 1 fewer click to click through. Enigma saves 1, has 1 more subroutine, but either ties in strength or is dwarfed at 2 vs. 5. This is why it's included. It's a code gate that's strong vs AI, and that's useful in other matchups, whereas Swordsman is a pathetic 1 net damage, 2 strength sentry, and Wraparound withers upon sight of a fracter. It costs the classic ZU.13 Key Master 5 to get through on a remote, which is non-negligible. And all this in a relative dearth of midrange HB code gates.
Sure, it's not reliable for keeping the runner out. But if you're either playing a no-advance strategy (HB has 2 effective 3/2 agendas and plenty of assets and upgrades to bluff with), or stacking the server with Ash 2X3ZB9CY/Caprice Nisei, spending an entire turn on a single run is not feasible for long.
As the flavor text mentions, Turing is a reference to the "Turing test," posthumously named after the pioneering computer scientist Alan Turing who proposed it, which is a test to differentiate between Human and Artificial Intelligence. Hence, AI breakers "fail" the "Turing" test.