Android 17 was so powerful in Super for nearly the same reason that when Frieza and even Fat Buu trained they got a massive power boost.
Their base is already massive without any training.
Android 17 is organic and mechanical, so he has potential to increase his power through training.
How did Android 17 come back in Dragon Ball super?
How in Dragon Ball Super does Android 17 come back to fight in the multiverse tournament? Android 17 was ressurected in the Cell saga from the wish made by Krillin to Shenron. He was an off-character till the Tournament of Power.
Is 17 stronger than Goku?
andriod 17 stated that goku was holding back his full power. Frieza’s golden form is stronger than ssb form but vegeta and goku have achieved stronger forms that are stronger than frieza’s golden form.
Is Piccolo stronger than Android 17?
Android 17 is confused as he notes that Piccolo is now stronger then Goku according to his Database. Cell starts his attack on Android 17 to absorb him. Piccolo tries to help Android 17, but both are over powered by Cell. Piccolo is blasted by Cell and thought to be killed.
Who stronger Android 17 or 18?
Even though her brother, 17, was mentioned to be programmed slightly stronger than her, he was unable to reach its maximum potential (Dr. Gero’s flaw, corrected on 18), making 18 the strongest of both twins. Akira Toriyama himself stated it during an interview (stament here ).
Photo in the article by “State Department” https://www.state.gov/reports/to-walk-the-earth-in-safety-2018/