Life experience? Meaningful experience is gathered in every year, regardless of what you do? You get meaningful life experience living in the same town all your life, leaving school at 16, doing the same (bottom rung) job forever, not experiencing anything new? Obviously not all pensioners have lived like that, but to pretend none have is laughable. Who has more experience, an 80 year old like I described, or a thirty year old who's lived in a few countries, has a couple of degrees in objectively useful subjects (say, with this issue, law/European and international law), has worked a variety of high level jobs, etc? You get the point. Yet somehow the old person's experience trumps that young person's experience?
Here is my opinion on the whole 'age' thing..
There are two key factors I consider
1. Generational experience/knowledge.. this is a factor, e.g. someone really old may remember the impact of post war britain and so never really trust the 'europeans' due to that 'experience'.. where as younger people have grown up absolutely side by side with europeans.. You could say that these almost offset each other to some degree..
2. Ability to make decisions. for this, you can only consider an individual, there is no point comparing yourself to your grandmother.. Just look at how any individual grows with age, they gain more knowledge and experience and make better decisions as a result.. this is why people progress in careers, they get more experience of the bigger picture, they've got experiences to draw on that make then not over-react etc..
So, I would say that the reality is that the relative naivety of youth is offset by the doggedness of really old people based on generational knowledge.
The middle ground is then the true age related experience of making balanced decisions, which no doubt explains why the 30-50 camp are far more 'balanced'.. which IMO reflects the subject perfectly, their is no 'right answer', Europe is not perfect, and neither is pulling out of Europe, but experience and wisdom dictate that we won't crash into oblivion either..
Just consider this,
If everyone was better at making these far reaching decisions aged 18-24, then the world would be upside down, you'd have all world leaders, CEO's and prominent leaders being aged 18-24 , and they'd slowly get demoted as their ability to make decisions in the current world diminished.. However, despite the notion that old people are hapless as a generalisation, why is it, that people are generally 'older' when they are trusted to make better decisions?