Most companies have implemented means of 2FA / MFA.
Why can’t the user have a choice about this?
Listen: my Apple ID password is a fully-random string of letters, numbers, and special characters. Generated via rolling dice. I spent a day memorizing it and it’s not used on any other service. No one is getting that password.
I put in that work so I wouldn’t need a second factor. And now Apple is saying I need a second factor anyway?! How does this benefit me?
If you haven't watched the WWDC keynote, you may be unaware that Apple is embracing putting digital ID's into your Apple Wallet (think your drivers license, health card, eventually passports, employer ID card). These entities will almost certainly require 2FA/MFA to ensure that this information hasn't been compromised in any way.
Your password, no matter how cryptic, does have the potential to be intercepted out there in real life. True, random character selection does minimize how easily brute force crackers can solve it, but it's also going to slow how quickly you type it in when you need to.
Then, of course, the question is - why do you need to resist having another layer of security protecting your account? In what way is this an inconvenience once you've authorized your devices?
And,yes, per my original point - the benefit to you is that you'll continue to be able to use all of the features of your device as it continues to play a bigger part in your digital identity as you navigate your environment.