No, it's not an issue.
You're not, I am using it too 
The thing is, everyone has its own habits, workflows, ways of doing things.
I made this when I realized I was spending too much time trying to find some tabs that I kept open "just in case" I'd have to do one of those things and in the end my listers were cluttered with too many tabs. So I decided to use tab groups to open between 1 to sometimes 10 tabs related to a task, and when that's done, I close it ... until I need it again.