I'm a person who really enjoys having a partner to work on stuff with. Maybe there is some obscure syntax that needs googling -- one of you can go look it up while the other keeps working on the actual logic challenges.
Perhaps you're just struggling with motivation, or your sleep cycle, and knowing that someone is waiting on you to get up off your lazy backside and get on voice chat and get to work is important to you.
Maybe you just enjoy bouncing ideas off of another person, and hearing their ideas, then working together to make them a reality.
Not only that, but for a lot of new coders who might want to go on to make a career of this you're going to need to learn how to talk to other humans about code.
I can fire up an app on my phone and find almost anything I want. I can buy a broken refrigerator, sell a camera lens, or as the title implies find someone to go on a 'date' with.
I know there are lots of great communities (my favorite being dev.to due to the diversity of skill level, writing style, and culture) but there isn't a centralized place to say "I'd like to build my first Vue/React/Vanilla-ts/Python/whatever, anyone want to learn with me?"
I know the webdev community loves to think of itself as super inclusive and open and friendly but to be honest, it is a little cliquey. Go on any Discord server about webdev and you'll find there is a group of people who are usually highly skilled and very tight knit. Open source projects are even more intimidating.
I wish I could swipe ... right? left? I've never used Tinder but whichever way you swipe to say "We're a match!" and find people to work on projects with.
People often say learning to code on your own is an "adventure" but in all my years I've never once been on an adventure that wasn't enhanced by having someone else along for the ride.