@Tim_Ramey. I believe Matthew 18 gives concrete evidence of what we call guardian angels.
" But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea. Woe unto the world because of offences! for it must needs be that offences come; but woe to that man by whom the offence cometh! Wherefore if thy hand or thy foot offend thee, cut them off, and cast them from thee: it is better for thee to enter into life halt or maimed, rather than having two hands or two feet to be cast into everlasting fire. And if thine eye offend thee, pluck it out, and cast it from thee: it is better for thee to enter into life with one eye, rather than having two eyes to be cast into hell fire. Take heed that ye despise not one of these little ones; for I say unto you, That in heaven their angels do always behold the face of my Father which is in heaven. "(Kjv)
Perhaps our confusion comes from attributing human limits to heavenly administrations. We do that concerning GOD I guess it is not strange that we assign limits to what is meant by guardian angels. To our dismay, when we view the administrations of GOD from a human perspective then we see no problem with concluding it is not possible for some things to happen if we all have guardians. To me, that is an issue of trust. One we all share. One that Job had to come to grips with before concluding, “Naked came I out of my mother’s womb, and naked shall I return thither: the LORD gave, and the LORD hath taken away; blessed be the name of the LORD.” Job 1:21(Kjv).
Often when we consider guardianship, we are talking about keeping away harm. But I believe GOD goes much farther. The very presence of GOD in our reality means He is always guarding, He is always in control. My very human reaction to pain in my flesh, in my heart or in my mind does not indicate the guardianship is not in effect. It does warrant a closer look and a deeper listen. When I insist on the trustworthiness of GOD, when circumstances are not allowed to dictate my response, I have always seen the guardianship. The Lord tells us He will use everything for the benefit of them who love Him and keep His commandments! He tells us that, but this human stuff is a dragon-slaying event every time.
The guardianship of our world can be rightly assumed. Despite what we do to one another, GOD is entangled with every aspect of every individual life. His arm never too short, and never missing in action. I think the unpleasant situation of our lives echoes the heart of GOD as well.
" My help cometh from the LORD, which made heaven and earth. He will not suffer thy foot to be moved: he that keepeth thee will not slumber. Behold, he that keepeth Israel shall neither slumber nor sleep." Psalms 121:2-4 (Kjv).