Thank you for all the comments, and the questions.
Why the number 35? Random number I know but I think I read somewhere that that's when youth stops. So at the age I would have thought tinted glasses come off and one learns that what's is lovely to have a lovely wedding it's the quality of the relationship that counts and for this a certificate does not seem to make a difference.
Also people that marry early say in their 20's and build a life and assets together deserve the assists to be split equally, however if people marry later I life last a few years and split up, on top on the emotional mess the person who worked hard/inherited assets gets to loose out financially too.
In a situation were the higher earner is woman with kids the children suffer even more from the possibility of their home being sold when said man should have just left. This could also be tricky if said woman had DC's from previous relationship.
No I am not 17 am actually devorced (very costly Devorce I must say and had to pay him a lot of money as part of the Devorce, on top of dealing with his cheating and keeping my kids sane through the process)
I am now with a lovely DP, I enjoy the fact we choose each year to be together not trapped by fear of the Devorce court. ( I think he would like to Marry as he tells everyone I am his wife, he knows my views...
The next of keen argument is a non starter as you can have power of attorney sorted. You can also change names by deed poll .
I like the inheritance tax argument that makes sense.
An earlier poster made a comment on affluent people marrying more than the not so affluent. I would be interest to hear if this is in situations of similar wealth or not?
So apart from romantic reasons and inheritance tax, is there more value to marriage I am missing?