He clearly uses it as a docking station. 100$ for an elegant dock is high, but not ridiculous.

$100 for a docking station is not bad. I use this one from Dell.

http://www.dell.com/en-us/shop/dell-docking-station-usb-30-d...

I did, in 2012. I bought a $1,400 MBP because I was replacing $1,000 non-Apple laptops every 12-18 months due to mechanical issues - keyboards, hinges, power ports, etc. That laptop lasted until late 2016 when my daughter spilled a quart of milk onto it. If not for that I’d probably still have it.

Today’s MBPs? There’s no rationalizing the cost for me.