What is issue with example in book Agile Software Development, Principles, Patterns, and Practices for template pattern

In book Agile Software Development, Principles, Patterns, and Practices there is below example mentioned which shows how template pattern can be abused

public abstract class Application
{
private bool isDone = false;
protected abstract void Init();
protected abstract void Idle();
protected abstract void Cleanup();
protected void SetDone()
{
isDone = true;
}
protected bool Done()
{
return isDone;
}
public void Run()
{
Init();
while (!Done())
Idle();
Cleanup();
}
}


public class FtoCTemplateMethod : Application
{
private TextReader input;
private TextWriter output;
public static void Main(string[] args)
{
new FtoCTemplateMethod().Run();
}
protected override void Init()
{
input = Console.In;
output = Console.Out;
}
protected override void Idle()
{
string fahrString = input.ReadLine();
if (fahrString == null || fahrString.Length == 0)
SetDone();
else
{
double fahr = Double.Parse(fahrString);
double celcius = 5.0/9.0*(fahr - 32);
output.WriteLine("F={0}, C={1}", fahr, celcius);
}
}
protected override void Cleanup()
{
output.WriteLine("ftoc exit");
}
}

Can someone please explain what is wrong with this example . why does author say that Using TEMPLATE METHOD for this particular application is ridiculous. It complicates the program and makes it bigger