Limelight, many T2s who use the forum need to test their their bloods on a daily or regular basis and some others have to do their finger prick tests due to the style of medication they are using to control their diabetes.
Most T2s who control their diabetes using diet alone find their Doctors encourage them to test themselves at home, but some of us choose to. We do that to try to learn how our bodies are coping with what we eat and drink, without waiting several weeks to find out. I look upon it as my immediate feedback from my body.
Over time, I found some foods were better for me than others and some things I just needed to avoid really.
The numbers we get from our meters are different to our HbA1c as they're measure differently, which is a real pain. This link explains the differences.
http://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html