Get the newbee to understand that they and their bees are living in a micro-climate of sorts.
For example, Bob The Beekeeper's apiary 10 miles away may have gotten some rains that you did not. There may be a good honey flow around his yard and his bees may be busting out and packing in the honey while your bees may barely be surviving on your drought stricken area. The newbee needs to realize it's not his or her fault that the bees aren't packing in the honey, but that it is their responsibility to help the bees survive. They will have to manage their colonies different from the way Bob does. What's good for Bob isn't necessarily good for the newbee.
This can apply to other things other than just drought/honey flow....it can apply to your yard's proximity to feral/robber bee colonies, to nectar crops, right-of-way spraying, crop-dusting, skunk/bear/varmit populations, shade/sun, location, etc., etc.,.
Basically, I guess, point out that each bee yard will be at least a bit different from the next yard. Each needs to be managed on a specific per yard basis. Micro management, maybe?
Ed