Professional landscapers are capable of achieving the same results with less material and costing less.
Backyard landscape designers have used shortcuts in the past since most of their customers have had a limited budget for landscaping. Making a stunning landscape made of relatively cheap backyard material could be simpler than many people imagine. You may be used to some more expensive materials, but some flowering plants are costlier than other. If people are trying to cut costs it is possible that they are not in a position to purchase their favorite flowers or other plants installed.
It is possible to find other options that are simpler and cheaper to maintain, and that may have a similar look. People might choose a simpler landscape when they look at the various options of landscape design. Landscapes that are complex can look chaotic when you are in the real world although they appear more balanced than they appear on paper.