This isn't "bring your own computer", but "use your own computer to connect remotely and access the firm's computer". The data's still held inside the firm and

This isn't "bring your own computer", but "use your own computer to connect remotely and access the firm's computer". The data's still held inside the firm and the employee's PC isn't doing anything more than running a web browser. The first few paragraphs miss the point, though: they imply that this kind of remote access is quicker if you're using a brand new laptop than some old Windows XP PC.