It is dependent on the child
Your thoughts were mine before I had one to be honest, then we had a fairly high needs child due to severe reflux as a baby, allergies in regards to food, and harder to settle than some. There was a period where he was almost exclusively having to be held upright constantly due to excessive vomiting when laying down so mass exhaustion at the start, and I think the amount of effort it took to finally get him sleeping in a cot meant that once we got there we didn't vary it too much.
That being said we would visit houses etc for visits, but he wasn't a 'buggy sleeper', nor one to just sleep on you in a busy environment after he got used to sleeping in cot/bed over 6 months or so, and if over tired we would have up to a week of shite sleep afterwards so ended up actively avoiding that happening.
These things impacted our decision to not holiday abroad - effectively we felt it wouldn't be a real holiday for us until naps were over and we could have a good 12 hour day without serious repercussions! If we had done it earlier then we'd have had to either factor in naps alongside airport/luggage/travel to accomodation/flights - or miss the nap, and have multiple disturbed nights with night wakes due to over tired child!
Of course I wouldn't change him for the world but we aren't all blessed with super easy going children who can sleep wherever and have their routines messed with too heavily
I do still think people can be too rigid (e.g. certainly we moved nap/bed times by 2-3 hours to attend parties etc and just got him up a bit early or had a lay in the next day etc to let him catch up, some people seem to literally stick to times like clockwork) but ours couldn't just go out all day much as we would have liked. Though we tried! Quite a few times, but overall knew the price was too much and gave in eventually as we had to work and if he was over tired he would night scream probably every 30 minutes for 5-7 days!! Most the time he barely woke but you definately did when you heard it!
I'm not trying to put you off but it's worth bearing in mind before you have a little one that even the best made plans can just go AWOL!