I agree (and I don't normally generalize like this, so I apologize). I've spent most of my time in Peru but noticed it in neighboring countries as well.
That also is my perception, from Brazil. There is even the concept of "cordial man", coined by sociologist Sergio Buarque d Holanda, that is connected to this
This reminds me of a great adventure. A long time ago I was travelling through Brazil, in the Amazonas state. I was in Porto Velho and needed to get to Manaus quickly to catch a flight. The boat that would take us there (as I had found in the Lonely Planet) was present on the quay. But the captain didn't feel like going. If I remember correctly, he was waiting for more people. We needed an alternative route quickly.
The captain told us that if we took the bus to Humaitá (a smaller provincial city), we could take a smaller boat that would take us to Manaus. But he warned us that the boat only goes once in three days, and that it would leave soon. The last bus to Humaitá would also leave from Porto Velho promptly.
Despite this flimsy instruction, we didn't see any alternative. So we went. With great luck, we caught the bus and made it to Humaitá (I still have a picture of the boat river transfer the bus took: https://bashify.io/i/CdNcLf).
Our time in Humaitá was surreal. When asked about a boat to Manaus. Everyone told us a different story. There was no harbour (hydroviaria) personal. One person told us the boat to Manaus was named "Caçote". Another person said the boat was named something else. Then someone said it had stopped ferrying years ago. No, we heard from someone else, it would come in 5 hours! Yet another one said it was tomorrow. Someone else felt sorry for us because it had just left. I felt like I was in a (difficult) point and click adventure. There weren't a lot of people in town close to the river, so we ran into the same people from time to time. They would often give different answers to the previous time.
No one was willing to tell us they didn't know. Not a single person out of the 20+ we must have talked to.
In the end, a boat arrived. It went in the direction of Manaus. The captain said that he would only go up to Auxiliadora, and that was still a long way from Manaus. Once again without alternatives (going back to Porto Velho would surely mean we'd miss the flight), we chanced it. In the hopes that getting closer was worth it.
When we arrived at Auxiliadora, it was the smallest inhabited place I had ever been to. Perhaps about 13 houses. Some fishermen. No passenger boat would come for days, they told us. Not to take us to Manaus, neither to take us back. The fishermen had boats, I tried to offer them money so they would take us further. But their day was at an end and they wanted to relax, regardless of what I offered them (we were on a tight budget, but I was desperate enough to offer a significant chunk of a monthly wage, no dice).
Then we found out that on the boat with us, a woman had come who was in a similar predicament as us. She was Brazilian, living in MT and wanting to visit family in Manicoré (which was bigger, and closer to Manaus). Exasperated, she ended up convincing her family to come and pick her up with a speedboat. We hitched a ride. We were very thankful.
When we arrived in Manicoré, I felt like exploring the place. It looked so different from anywhere else I had been, like something out of a movie. But I couldn't. The docks were little more than a collection of wooden jettys (trapiche) that ran everywhere in criss-cross fashion. In order to even get to the quayside we would have to pass through many other boats. In the first one we went through, the captain walked past and I asked him whether he knew of a boat going to Manaus. He signalled where to put my bags. We were leaving.
We reached Manaus in the nick of time.
I love this story, and that time. These anecdotes definitely triggered my memory.
https://en.wikipedia.org/wiki/Cordial_man