I don't really know much about foundation less so I can't speak to that. I have heard others tell beginners to check the hive whenever they want. While I think the sentiment is good, it is counter productive to the super organism. Why would you want to check a hive every day? Why would you want to check a hive more often during the flow? I pull comb as little as possible during the flow. I tip the box back and look for swarm cells and that's it. I visited Ron Breland this spring. Since seeing his hives I disturb me bees as little as possible.They are your bees, disrupt at will.
Personally, it seems to me that no matter how many times i'm in the hives, they continue to do what is normal for them to do. I've opened up hives multiple times in a day and week with no diff in production compared to the others around it.We had a hive on the back porch, the back door would swing and hit it. Never seemed to bother them. We have gone back into a hive after 5-10 minutes to retrieve brrod, and never notices that the bees were not as they were the first time we opened it.
It is possible that different people have different skills, some may cause troubles for a beehive.
Maybe "Don't look too often" is an excuse for lazy beekeepers?