No, you don't have to. I'm saying what I use because it works for me all these years.

If you want to save the confusion and frustration of what thinner to use without worrying about the chemistry aspect, buy the brand thinner as your paint brand. Example - AK Interactive 3rd Gen paint, buy AK Interactive 3rd Gen thinner, AK Interactive Real Color paint, buy AK Interactive Real Color thinner, Tamiya paint, use Tamiya thinner, Testors acrylics, use Testors Universal thinner, etc…