Not necessarily. Some holy people die young. We Orthodox read a Scriptural verse about that (not part of the Protestant Bible), on Saints’ days. I cannot locate it right now. It’s about God taking some holy people young, before they can become corrupted with sin.
But there are other Scriptural verses—for example—about Nebuchadnezzar going mad. Evil can destroy the mind. But we must not judge others in that regard.
Wisdom of Solomon 4:7a, 16a, 17a, 19b-20; 5:1-7
But though a righteous man may die before his time, he shall be at rest. But a righteous man who is dead shall condemn the ungodly who are living. For they will see the end of the wise man, but will not understand what the Lord purposed for him, because He will dash them headlong and speechless to the ground and shake them from the foundations. They shall be left dry and barren to the very end; they shall be in pain, and their memory shall perish. They will come with dread in the day of reckoning for their sins, and their lawless deeds will convict them to their face. Then the righteous man will stand with confidence in the presence of those who afflict him; and those who reject his labors, when they see him, will be shaken with dreadful fear; and they shall be amazed at his unexpected salvation. They will speak among themselves with regret, and in anguish of spirit they will groan and say, “This is the man whom we fools once held in derision and made a byword of disgrace. We considered his life to be madness and his death as without honor. How has he been numbered among the sons of God? and how is his portion among the saints? Therefore we went astray from the way of truth, for the light of righteousness did not shine on us, and the sun did not rise upon us. We were satisfied with the paths of lawlessness, and we traveled through impassable deserts; but the way of the Lord we have not known.
(Next use will be in the Great Vespers on the eve of the Beheading of St. John the Baptist—Friday August 28 new calendar)
Death does not respect age. Agree.
I was referring to wisdom and discernment being gifts from above. Likewise, if you are in rebellion against the Lord, He has no obligation to protect you from becoming a fool or to protect you from demons having a field day with the mind or body.
Also agree that we must not judge others. However, sometimes I cannot stop myself from being a fruit inspector. (by their fruits ye shall know them)