Also likely because in the past the internet was really diverse. One would visit 20 sites possibly during one session.
Today, the landscape looks more like: You visit Google, click some links that open in AMP (still Google), visit some social networks (primarily Twitter and FB-owned properties). These companies already operate TLS-only, which helps these numbers.
Not to mention the world-class encryption used by torrents is RC4. It would be hard to pick a worse cipher (the encryption protocol was designed in 2006).
Today, the landscape looks more like: You visit Google, click some links that open in AMP (still Google), visit some social networks (primarily Twitter and FB-owned properties). These companies already operate TLS-only, which helps these numbers.