Hi Andrey, I’m glad you found this interesting! Thank you :)
To answer your question, I would say by using styled-components you needn’t worry about any style conflicts or styles overwriting each other. It is very useful when you reuse your components — the styling will remain consistent.
There are other advantages and certain disadvantages as well. I would suggest you have a look at this article so that you’ll have a brief idea of what approach to use for your projects.