[Michael Deters]

If you need reassurance on that – yes.

The annotations say the exact same thing Meret said:
(Look at 12.4) „The key word in this rule is ‘solely’. The intent of the player’s movement can be partly motivated to prevent an opponent from taking an unoccupied path to the disc, so long as it is part of a general effort to make a play on the disc.“

[Michael Deters]

Well, the rules don’t explicitly say that I can’t throw from inside the endzone. Only if I *end up* with my pivot behind the attacking endzone line, I have to go back.
So, an argument can be made that I can throw from inside the endzone while slowing down or having two additional ground contacts.