If you had a dollar for every time a thread that wasn't originally a sede debate devolved into a sede/non-sede debate, you would be able to make this forum your full-time job. Very good lawyer/doctor/CIO money too.
Talk about judging by the fruits -- the fruits of the INCESSANT DEBATE (sede vs. non-sede) are putrid and completely lacking.
Regardless of which of those positions themselves bear better fruit (let's not get into a debate here!), the ARGUING about those positions is certainly counter-productive AT BEST, a waste of time, and sinful at worst.
Advice un-asked-for is often spurned.
If someone comes up to you questioning his own position on the Pope and asking you for advice -- then go for it. Otherwise, you're wasting your breath. No one converts their whole life and position from a post someone made on an anonymous forum.