I'm not talking past you, your crowd generally talk past me with "it's fine - works for me - just wear headphones - actually it's a benefit", etc.
In my own experience - I've known a few people who were genuinely better at their development work in open environments. Better as in measured output vs what they thought of themselves. They felt better - they liked the atmosphere - but they also thought they did good work, when they weren't doing terribly good work. Was it causal? Probably not, but it more proves the point that it's harder to self-assess beyond emotional state (which, really, IS a component of work life - I get that).
But what also happens with these religious wars is that the few anecdotes of "hey - I ENJOY working in open plan areas" is used to justify it for everyone.
You want open with other people - that should be allowed. You want an office with a door to shut to work? That should be allowed too. You want to switch between the two - that should be allowed and it EXTREMELY RARE.
Essentially, without loud 'anti' open office plan voices, the 'hey, this is cheaper' crowd gets its way. And when they can find a small percentage of people who do work well in that environment, it's justification-icing on the decision cake.
You're paying a team of people... say, $500k per year - spend the extra few percent and get an office that can accommodate multiple working styles to have the best possible places for all types of people to work. The larger world tends to default to the benefit of extroverts, and 'open plan offices' is one more 'default' that needs to be challenged, especially for many knowledge workers.
In every place I've been with open plans or open cube farms - management NEVER sat there - always had private offices. There's an acknowledgement that it's useful for some type of work, and you're not it. Incredibly divisive attitude for a 'team' to have to put up with. And... for every one example of "but... famous person X sits in an open plan with the team" there are hundreds who don't - it's not the norm.
"No one here is trying to shove an open-plan office down your throat."
MOST companies are because it saves a few bucks. The costs may be non trivial, but the cost compared the salaries, benefits and lost productivity generally are trivial.