Updating the OS, installing anything, setting up email accounts, setting up notifications from social media, basic tools for computer science class (including a terminal), bookkeeping stuff like calendar and contacts (!), playing video files, saving passwords, opening a zip file or disk image, backups (Time Machine). Network, audio, shortcuts, and most other settings are also easier to manage in Sysprefs. There's a reason everyone in college uses one.
The displays have improved to follow the rMBP, but they're still worse all around. Hard to find one that has the right color and everything. Apps tend to support scaling less properly in Windows too.
IDK, I typically use a trackpad at work while coding. It's closer to my keyboard than my mouse is. But I guarantee most laptop users don't have a mouse.
-updating the OS, handled automatically by Windows
-installing software on a Mac: open a dmg, or run an installer. Windows: mostly run an installer, some software is a self-contained exe. Both are just as easy to execute.
-social media notifications: Haven't used Mac OS in a few years, but on Windows 10 I get notifications from all my social media websites on my desktop without any setup on my part. It just works, go figure.
-Mac OS has terminal, Windows has Command Prompt. Functionally the same.
-Calendar and Contacts: Don't know about either. Never used a computer for that, its all on my phone.
-Playing video files, really? MacOS: Quicktime/iTunes Windows: Windows Media Player/Groove Media Player. Both work the same, double click a file and it opens. Everyone knows VLC is better than what either OS comes with.
-Saving passwords. Again, not sure on this one. The only passwords I save are for websites, and Chrome keeps those for me.
-Opening a zip, again, really? Both OS have built in zip extraction thats functionally identical. Double click a ZIP and it opens, right-click for more advanced unzip options.
-I'll agree, Time Machine is far superior for system backups.
-Network, for the third time, really? Wireless, scan for a network, click SSID, enter key. Ethernet, plug-n-play (do Macs even have ethernet anymore?) Its literally just as easy on both OS.
-Audio: Plug in speakers/headphones to appropriate jack, works on Macs, PCs, cellphones, Mp3 players, discmans, and some portable 8-tracks.
-Settings: Mac OS I'll admit has a cleaner settings menu than Windows 10. But Windows 10 isnt so bad as to make it excessively difficult either.
All the stuff you listed is basic day to day stuff thats easy on pretty much any platform, even Linux these days. My computer illiterate mother had been using Mac OS for 4 years, bought herself a PC laptop, and needed no help to do the same tasks on it, despite never having used Windows 10. If Windows 10 was as difficult to use in day-to-day life as you try to make it out to be, it wouldn't be the most common OS, it would be relegated to enthusiasts and niche applications the way Linux is.
And I would be willing to bet more laptop users own a mouse than don't. Mice are far more comfortable and precise than trackpads.