wolverine peak strength and darth maul injuried with no fatal injuries with light saber
That's bullshit and you know it. There's more than a dozen substances in SW itself that a lightsaber can't cut through, regardless of who was wielding it. Cortosis, Mandalorian Iron, Phrikite, the hide of the Zilo beast, and energy shields clearly stop lightsabers. None of these are indestructible or even close to it. Adamantium is Nigh-Indestructible, even in a universe where figures have strength enough to wreck planets, crush stars and other such craziness. Adamantium has never been broken without a plot-device or reality warping.
Actually they can use force in order to enchance strength of their saber and make it able to cut through anything