Earlier quoted context omitted.
No it's not! That was thought 30 years ago, but building technology has advanced. Ventilation needs to be controlled. Having cracks and leaking windows is very inefficient in keeping an optimal indoor climate, not to mention very energy inefficient. An airtight, very well insulated house with active ventilation (an indoor climate control system, not to be confused with airco) is the best way to get an optimal indoor…
I wasn't talking about leaking windows. You can't seal a house up and think it's going to be a nice place to live. You need a way for the house to breath. Which is exactly what you've said.
Sorry, I thought you were agreeing with the person you were replying to. Like adestefan says, I consider 'breathing' (like 'organic ventilation') a euphemism for 'crappy air control'. But if we use 'breathing' as 'well-ventilated, in a controlled way', then I guess we agree.