Garden fences can be as secure as you like, with the option of various different kinds of fences that you can install. Fencing technology has come a long way, and fences no longer have to be rickety and wobbly; you can choose strong, sturdy fencing that will last you for many years to come.
The main thing is to choose the right kind of timber for your fencing needs. If you want something that is going to be sturdy and stable, choose a high quality hardwood timber, probably that doesn’t have any kind of fancy design; something like a simple featherboard fence is probably going to be more wind resistant. If you start installing taller fences that are more decorative, then this could mean your fencing is actually not as strong as it could be.
You should also make sure your fence is properly installed to give the best security. Install it following all instructions, or get the help of an installation expert.