So your phone gets stolen, then what?
Then you have bigger problems. They'll have access to your empty bank account and those incest photos.
If your phone gets stolen and you can't remember the recovery password you'll never get your account back.
Perhaps do what the app says &
WRITE IT DOWN & DO NOT LOSE THIS CODE.
What if you forget your PIN number for your credit card?
What if you forget your password to your account, and the password to the e-mail account you used to make the account.
You can't simply log into the computer and be like "oh I want to switch from phone to computer"
Yes you can.
Honestly I was totally against using the stuffty mobile app but because I wanted to trade and stuff I just got it anyway. It has worked flawlessly & I have no complaints.
If you think having to get your phone while trying to log in to steam is more of a hassle than waiting 15 days for a trade than you should re-evaluate your time.