The problem with interviews that rely on discussions of experience alone is that they aren't effective.
It's easy for candidates to exaggerate or misrepresent their accomplishments. This is especially true when they worked on large team projects. For example, if they say "I was part of the team that built Google Search", that could be a really impressive thing if they played a key leadership or technical role, or it could be a really unimpressive thing if they hung out while others did the heavy lifting, and it's very hard to tell the difference.
It's easy for candidates to exaggerate or misrepresent their accomplishments. This is especially true when they worked on large team projects. For example, if they say "I was part of the team that built Google Search", that could be a really impressive thing if they played a key leadership or technical role, or it could be a really unimpressive thing if they hung out while others did the heavy lifting, and it's very hard to tell the difference.