If this is your line of thinking, or if you are trying to persuade others why other alternatives should be included, here are some reasons why a climber may not be the first thing you want to spend your money on:
1) They only foster one kind of play, at the expense of others
Playgrounds may be the most dangerous place you take your kids. Some believe this is because they only lend themselves to one way play. You climb up, then you climb out, then you fall off. After the brain and body has utilized the equipment the intended way a few times it gets bored and tries to give itself new challenge. This is when the equipment gets used, say by the third visit, in ways outside of what the manufactures intended it for. This is how my own son broke his arm- climbing on the outside of the tube slide to battle his friend, who then pushed him off.
Also play structures work on the development of gross motor play, but only a small subset of that, but do little to foster fine motor skills, emotional development, or imaginative play. On most play structures kids can not easily skip, there is little to push or pull, they can not lift loads across the playspace. Kids can not perceive differences in heavy or light or different kinds of sensations. There is very little pinching, handwriting, threading. It is harder to invite a friend to tea on the top of the slide, or to include very many friends in the top of your tower. And since the essence of imaginative play is loose parts- those bits that can be structured and restructured into infinite creatures, emotions, role-play, costumes, vehicles, counters, or alphabets- it is disappointing when there are few to be found besides wood chips. These areas also are usually designed for a very specific targeted age range and are inappropriate or even dangerous for other siblings who may find themselves playing at the same location.
2) They demand very expensive materials for filler and shading
If you decide that you are going to build a playground, the conversation will then turn to necessary fill requirements to make the space safe. Very quickly you will realize that your budget has been
Additionally when most large playgrounds are built, one of the first things that is inevitably done is that trees are removed. Now you have no natural shade and natural play elements are removed. The exposed playground equipment gets hot! This makes the space more limited to certain hours or seasons for comfortable play to occur. Many pediatric and dermatological associations are also beginning to worry about the consequences of excessive sun exposure in young children. So shade sails, which often cover a very small part of the space, must be ordered.
3) They don't usually lend themselves to imitating nature in structure or function
With few exceptions, most playgrounds do not imitate or leave room for nature. How lovely though when there is a "nest" to climb into, a cave to go through, or a forest to lie in. In most playgrounds it is hard to find much which imitates biological, chemical, or physical processes. There is not usually available water. Where are the life-cycles, evapotransporation, or melting? Does the space foster biodiversity or are the humans the only ones allowed? Are there rocks to turn over, layers to unearth, decomposition to witness?
The children hope so.