What is the point of linking up my Steam/Twitch login to Fizz?

I'm also curious to know...

Anyone ?

Edit:
Maybe you should directly ask a representative of Fizz support.

Here's how to contact customer support by chat, from 8 AM to 9 PM everyday:
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- Connect to your Fizz account (if you have more than one, connect to the one that has the problem) by clicking « Login » in the top right corner at fizz.ca


- Click on this link: https://fizz.ca/en/contact-us
- The green chat bubble should appear after a few seconds in the bottom right corner.

Under 'My Profile', it's written "Link your social media accounts to log into Fizz". It's basically another way to log into your Fizz account. If you log out and try to sign in, you'll see "Sign in with Google/Facebook" and if you click on "See more options", you'll see all the other social media accounts.
For example, say you link your Twitch account, and you're currently sign in on Twitch on your browser. If you were to log into Fizz, you could just click login with Twitch and it'll automatically sign you in without entering your Fizz email + password.
TLDR: Different ways to sign in because why not x)