“Why You Shouldn’t Provide Marriage Advice
1. You’re still single….”

And in the same breath you say
“…find the perfect mate”

So by the look of this logic, you, the author, are married.
And you say in the very first of ten, which means it is the most important concept and most thought out by you, that a married person is 100% qualified to give a single person advice because you do that, you say “…find the perfect mate” but according to you, the single person has no capacity to discern the workings of the married mind enough to give any advice for them.

that’s laughable