Why were they notably reticent about their feelings during disputes?!

In The Name of Allah, The Most Merciful, The Bestower of Mercy.

The reason our clan and tribe elders were notably reticent about their feelings when not required to speak or provide testimony during disputes

Abu Hurairah, may Allah be pleased with him, reported that Allah’s Messenger, peace and blessings of Allah be upon him, said, “Indeed, from the perfection of a person’s Islam is leaving that which is of no concern to him”. [Hassan Hadith. Reported by Imaam Tirmidhi and others]

فمن حُسن إسلام المرء تركه ما لا يعنيه، التَّدخل فيما لا يعنيه قد يُسبب مشاكل، فمن حُسن إسلام المرء، ومن حُسن إيمانه، ومن حُسن سيرته: عدم التَّدخل فيما لا يعنيه،
فالإنسان إذا ابتعد عمَّا لا يعنيه، ولم يدخل في مشاكل الناس، ولا في سؤال فلانٍ وفلانٍ عمَّا لا يعنيه، فهذا هو من كمال إيمانه؛ لأنه قد يدخل في شيءٍ يضره، أو يُشوش على غيره، أو يُسبب فتنة

Imam Abdul Aziz Bin Baz, may Allah have mercy upon him, said: From the perfection of a person’s Islam is to leave what does not concern him. Interfering with what does not concern him may cause problems. From the perfection of a person’s Islam, from the perfection of his Imaan, and from the perfection of his conduct is not to interfere in what does not concern him. Therefore, if a person distances himself from what does not concern him- neither interferes with people’s problems nor asks so-and-so about what does not concern him, this is from the perfection of his Iman, because indeed he may enter into something that either harms him or confuses others, or causes trial.

https://binbaz.org.sa/audios/156/6–%D9%85%D9%86-%D8%AD%D8%AF%D9%8A%D8%AB-%D9%85%D9%86-%D8%AD%D8%B3%D9%86-%D8%A7%D8%B3%D9%84%D8%A7%D9%85-%D8%A7%D9%84%D9%85%D8%B1%D8%A1-%D8%AA%D8%B1%D9%83%D9%87-%D9%85%D8%A7-%D9%84%D8%A7-%D9%8A%D8%B9%D9%86%D9%8A%D9%87