Training is only the solution if knowledge and skills are the problem (ATD, 2018). However, knowledge and skills aren't always the problem, although the talent development function can sometimes be viewed as a savior to resolve a multitude of out of scope issues. That said, it is important to consider that performance issues also stem from structure/processes, resources, information, motives, and wellness/capacity (ATD, 2018). So, don't utilize training for something for which training is not the appropriate solution. Instead, think like a performance consultant to get to the root cause.
Biech, E. (2018). ATD's foundations of talent development: Launching, leveraging, and leading your organization's TD efforts. Alexandria, VA: ATD Press.