Tigers of Old said:Serious question. How is it diluted?
Because marriage is about a man and a woman. There's hundreds of years of this being the tradition. Sure it has been tinkered with over the while, but it has - in western culture - pretty much been about man and woman.
If marriage becomes anyone can marry anyone so long as they're consenting, it no longer means the same thing.
I recognise that other groups in society should have the same legal protections/entitlements as Heterosexual couples, which is why I think there should be something equivalent legally. That group can and should start their own traditions, rather than try co-opt another section of society. Who knows, maybe if that happens, people will look at things like divorce rates and other factors and say, why isn't traditional marriage as successful as civil union?
In a way, it's like the suburb I live in. There is a very large proportion of the community is from another religious group. Each year the council celebrates the religious festivities of that group. Festivals, billboards, etc.
When it comes to Xmas however, the amount of decorations has reduced and the length of time they are displayed has become shorter and shorter to respect this other segment of community. That change hasn't stopped me having family outings on Xmas Day, but it has reduced the special feeling that that time of year had. The question around the house of my in-laws (who are somewhat religious) is why do they need to lose something, for someone else to gain something. They're more than happy for the other religion to celebrate and be happy, but why must they reduce their own celebrations so as not to offend the first group?
Hopefully that analogy gives some Indication of what the change would mean to me as a comparison. I've done my best to try do so in a way that I hope is inoffensive.