This is true, but let's add some interesting stats.

I just checked the settings for active users in the last 3 months and turned out that:

• 60% of the users just use the default setting (light mode)
• 26% of the users who set a preference use night mode
• 14% of the users who set a preference use light mode

So night mode is popular between the users who know how to reach the 'Settings' page :D