Sorry but the red part is very judgmental thought process. Everyone is entitled for marrying anyone who is found compatible and likeable.
No rules should be applied for making any ‘kind’ preferred.
No one so far has said virgins are somehow diseased.
No one has to give three reasons for you to get married to a virgin.
It is YOU who is making yourself a rule of not marrying a virgin, no one is forcing you there to do the contrary.
Feel free to marry a divorced/previously married person. More power to you.
But your preference is your preference, not a general rule. Some people even though previously married can prefer virgins or vice versa.
It is YOU who showed negative thougts and being judgmental again for your cousin’s brother. Not a good mindset. Let people marry whomever they like to marry.
Again, no rules should be made. It is all about different hierarchies of compatibilities and likings.
No idea about any other thread you mentioned, but by all means virgins are free to marry virgins. If that is what they like and prefer.