Do you not understand Paul’s statement that those who are married now will soon be the same those who aren’t married, or never married? That this is passing away?
There will be no marriage in heaven. We are to look forward to that state, as that is our permanent one. This is a temporary condition we are in now, being alive in the world, and marriage is a thing that exists only in this world. Whether you marry or not, it is only for a season, and then it will be gone. So it is very much a worldly concern.
Yes, that is a possible theological rejoinder, taking worldly as synonymous with earthly.
Still, this is only to point out an advantage of singlehood. Please note that if everybody did this then the bible itself would be a lie... humanity would die out.
And you have certainly not established that it is “holier” not to choose to engage with matters in this physical earth (if that is the construction you choose to put upon “worldly” in this context).