Comment by tvbusy

Totally. Frameworks also make it a lot easier for new team members to contribute. React, for example, makes it a lot easier to hire. Any project with moderate size will require some kind of convention to keep things consistent and choosing a framework makes this easier.

Now look at the cross team collaboration and it gets even harder without frameworks. When every team has their own conventions, how would they communicate and work together? Imagine a website with React, Vue, Angular all over the place, all fighting for the same DOM.