Agree 100%. Every year we have kids tortured because they made a silly mistake because they pushed 'send" too soon.
It is worth taking the time to finish the application, save your work, and go back to it when you are fresh another day. That catches typos, silly mistakes, or even just “Help, I put my twin sister’s social security number on the application (it’s one digit different from mine) and she’s not even applying to that school- what should I do?”