The statement is incorrect because the results of a bandwidth speed test are not solely dependent on the network infrastructure but are also influenced by client-side applications. If there are high-bandwidth applications running on the client device during the test, such as streaming services, large file downloads, or cloud backups, they can consume significant network resources and thus skew the speed test results. This understanding is pivotal for network professionals when performing accurate assessments of network performance, as they must consider the client's current usage and possibly schedule tests during periods of low network activity to get a true measure of the infrastructural capabilities. Therefore, the notion that speed test outcomes are independent of client-side applications is a misconception that can lead to incorrect diagnosis and troubleshooting action.