Metallic alloys physical vs Ki attacks
If you look at the facts behind a lot of metals in the Dragonball canon, you can see a lot of things being named unbreakable or even unable to even be scratched. This, however, is not the case for attacks involving ki. These are 3 instances involving a physical attack and a ki attack on the very conflicting kachin of universe 7, and hachi-kachin which is considered even tougher and more durable.
The first is the Z-Sword. Everyone remembers this from the Buu arc. But, no one thinks about its explanation in Dragon Ball Super. Beerus purposefully made the Z-Sword to hold Old Kai. And despite the renowned power of it, welllll, it snapped when met with Kachin. Thus, at the time of the sword's creation, we can infer the God Ki within Beerus was not as strong. This is connected to the next point. Which I will go right to.
The Tournament of Power stage was destroyed before the tournament by various Destruction deities. And it was made purely with Hachi-Kachin. Note that, in the scene, they focus purely on ki attacks. And, according to Toriyama, ki attacks are a physical manifestation of the spirit of those using them. In Dragon Ball Canon, that means every ki attack's strength could change in response to the mindset of the person or the reactions of it as well. We have seen this fairly recently with Vegeta on Yardrat. He now has insanely high power from a change in his spirit. Yet, though the Destruction Deities rebuilt the stage, albeit with their own power infused as well. The last point on the list shows that these are not stronger than some mortals in Dragon Ball Super.
Yes, we all saw that throughout the Tournament of Power, the stage steadily grew smaller. Almost to the point where an enchanted indestructible metal seems superfluous to those with as powerful a spirit or even spirit control as Goku, Vegeta, and Jiren. At least 90% of the arena was destroyed with just them, and 75% just Goku and Jiren. Surprisingly, the rest of the competitors would also make small dents or even cut a path through it at times.
Could this mean that Dragon Ball canon is implying that the resolve and overall mindset of a character spiritually is better at influencing the world than fists? If so, Toriyama has a way with words, and may be a philosopher at heart.