O Metal tem que ser Hemalurgicamente carregado para Ruin para controlar alguém?

Temos vários exemplos de picos hematúrgicos sendo usados para controlar ou manipular um ser:

• Kandra
• Inquisidores
• Koloss
• Vin
• Penrod
• Spook

No entanto, a carta de Spook em O Herói das Eras diz:

Vin,

My mind is clouded. A part of me wonders what is real anymore. Yet, one thing seems to press on me again and again. I must tell you something. I don't know if it will matter, but I must say it nonetheless.

The thing we fight is real. I have seen it. It tried to destroy me, and it tried to destroy the people of Urteau. It got control of me through a method I wasn't expecting. Metal. A little sliver of metal piercing my body. With that, it was able to twist my thoughts. It couldn't take complete control of me, like you control the koloss, but it did something similar, I think. Perhaps the piece of metal wasn't big enough. I don't know.

Either way, it appeared to me, taking the form of Kelsier. It did the same thing to the king here in Urteau. It is clever. It is subtle.

Be careful, Vin. Don't trust anyone pierced by metal! Even the smallest bit can taint a man.

Spook
_{The Hero of Ages - Chapter 69}

Estou pensando se isso é realmente verdade. Eu só consigo pensar em um exemplo que suporte qualquer metal que permita controle ou manipulação.

O Senhor Governante disse:

I fear that it has corrupted my thoughts. It cannot sense what I think, but it can speak inside of my head. Eight hundred years of this has made it difficult to trust my own mind. Sometimes, I hear the voices, and simply assume that I am mad.
_{The Hero of Ages - Chapter 48}

E em O Império Final :

[Vin] flared the iron. Blue lines appeared pointing to the Lord Ruler’s rings and bracelets—all of them but the ones on his upper arms, piercing his skin.
_{The Final Empire - Chapter 38}

Esses braceletes, obviamente, não eram Hemalurgicamente carregados, porque o Senhor Governante não tinha necessidade de ser um Mistborn e Feruchemist completo. E, no entanto, permitiu Ruin falar com sua mente.

Então, é verdade que qualquer metal em uma pessoa permite controle? Se moedas suficientes fossem atiradas em alguém, poderiam ser controladas? E quanto a Miles Hundredlives ¹ ? Harmony seria capaz de controlá-lo completamente devido ao número de piercings? Poderia o Lord Ruler ter tomado o controle de um Terris Steward ² como ele fez com o Koloss?

Em suma, o Metal tem que ser Hemalurgicamente carregado para controlar alguém?

^{(toda ênfase é minha)}

_{1 - Milhares de Milhas}

“You need to get [Miles'] metalminds off of ’im,” Wayne said. “It’s the only way.”

“He keeps thirty different ones,” Waxillium said, “all piercing his skin,
_{The Alloy of Law - Chapter 13}

_{2 - Terris Steward}

“You’re a Terrisman,” Vin said. [Sazed's] earlobes had been stretched out, and the ears themselves contained studs that ran around their perimeter. He wore the lavish, colorful robes of a Terris steward
_{The Final Empire - Chapter 8}