Nas What is man that You take thought of him,Psalm 8:4
NET : Of what importance is the human race, that you should notice them? Of what importance is mankind, that you should pay attention to them?
NLT : What are mere mortals that you should think about them, human beings that you should care for them?
CEB : What are human beings that you think about them. What are human beings that you pay attention to them?
NRSV : What are human beings that you are mindful of them, mortals that you care for them?
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In the NET Notes it says that the singular noun is used here in a collective sense and refers to the human race.
I have gone through the same subject with Y1 dozens of times and he is not interested in learning.
The term son of man many times does not refer to Christ. It means humanity.
And the son of man that You care for him?
Nkjv What is man that You are mindful of him,
And the son of man that You him?
Any wonder we prefer more formal translations?