It's both. As a non-parent, you can have a vague, high-level idea about the demands of parenthood, but there's a lot of crucial and non-obvious details that aren't communicated to people without kids - mostly because it's either super boring or really tacit knowledge. So the parts of society that are run by parents tend to be kid-friendly; the parts run by childless are the opposite.
Examples of nonobvious consequences of parenthood include:
- Parents of pre-teens tend to be constantly late for everything. That's not because of lack of organization, but because the kid will randomly soil their clothes or do something else that needs to be taken care of immediately.
- Parents are also constantly interrupted. Especially with the first kid, it seems everything is a life-threatening emergency, so the moment it even looks at you funny, you'll start calling your spouse at work to consult or coordinate a doctor's appointment. Some workplaces accommodate that (mostly those staffed by other parents), some don't. It becomes a question you start asking about on the interviews.
- Say your company offers to send you to a conference or a training seminar. You'd probably jump at the occasion (yay, free education and zero responsibility, all on paid company time!), but you might be wondering why your coworkers all refuse to go, and don't even show any excitement about it. It's probably not because they're lazy, or just dispassionate 9-5 workers. It's likely because they're parents, and you can't just go to a conference as a parent. It's a huge logistical challenge.
- Parents like big cars because of storage space. Going up and down the stairs with stuff gets tiring really fast, so you end up e.g. storing trolley and surplus diapers in the car. If you didn't want a car before, you'll start to want one now. This goes against the general trend of environmentally-conscious living.
- If you aren't addicted to coffee yet you will be after having a child. You'll also learn that polyphasic sleep is a real thing (if it wasn't, nobody would survive the first months of parenthood).
- You'll start talking about shit with other people. And I mean literal shit.
- You'll bankrupt yourself if you try to buy everything new for the kid; you'll likely and out of a sudden become super frugal and very aware of all local clothes/items exchange/giveaway groups.
- A babysitter isn't a luxury, it's mental healthcare in the city.
I could go on and on, but it's late and my kid will wake up in about 5 hours. I'll be drinking an extra coffee tomorrow.