Sorry, no right or wrong answer here.
You do not NEED to make a starter. I've pitched tubes of WL before and never had a problem other than a long lag time (2-3 days before ferment starts). So, you can do it if you want to.
If you are making a high gravity beer or want to make sure that your yeast are viable, then yes, you do need to make a starter. Its the safest way to go.