I've been working remotely for years, and for companies that literally didn't have offices to work from. Everyone was 100% remote, and I can assure you that didn't have any impact whatsoever on people's passion for their work or the company they worked for.

I've seen people in an office not give a damn (literally doing a phone interview for a position at a different company at his desk), and totally remote people probably care a little too much, and everything in-between.