In the day to day drone of the mainstream media and other media forms, these type voices are rarely identified. Usually, these voices are never brought out to the general public at large because they don't fit the "agenda". However, voices like these, do have a point and a "real life - I have lived it" view.
http://www.thepublicdiscourse.com/2015/02/14370/
http://www.supremecourt.gov/ObergefellHodges/AmicusBriefs/14-556_Family_Equality_Council.pdf
Making policy that intentionally deprives children of their fundamental rights is something that we should not endorse, incentivize, or promote.
This holds no weight. When a child is raised by a heterosexual married couple there can be any number of reasons why one of the biological parents shouldn't be a part of that child's life. Adopted children that are taken out of a bad and abusive situation and then are given to a loving family, are they being stripped of their fundamental rights? Believe it or not, there are plenty of children raised by gay couples that would feel that their fundamental rights were being stripped away if their parents couldn't be married.
You're a conservative, you want small government, right? Why do you want them dictating who can and cannot be married? If you are of a legal age to make a contract, you can marry whomever else is also of that legal age and of sound mind/body. Period.
One of the girls that watches our children was raised by two dads. She is one of the kindest and most well-adjusted young people we know. If you REALLY care about getting the "I have lived it" view, then you don't have to go too far to get it. There's a reason that stories like these (and I'll admit I only read the first) are not plentiful in the media and it's not because they "don't fit the agenda," but because they're less prevalent.
Guess what, some gay couples are going to be shitty parents and some children of gay couples are going to have a rough childhood. But we ALL know and perhaps have been a victim of heterosexual parents that had no right having kids. A penis and a vagina don't automatically qualify you for parents of the year.
EDIT: Also, marriage does not automatically mean becoming parents. I have plenty of friends that are happily married and don't have children. I refuse the premise that people get married because they want to have children. People get married because they're in love with one another and want to spend their lives together. Often times this will lead to having children but increasingly more and more couples are choosing to not have children.
Edit 2: This article, in response to the article you posted says it better than I could.