I'm scared. Not because I think the Lions are that good, but when the Niners suck they really, really suck. Plus, I'm trying to not jinx anything by being overly confident. Not to mention, Shanahan-coached teams have a history of chocking in big games.
Having said that, I tend to agree with your logic. Assuming Deebo is ready, the line will go up. And if the Niners show up the way they are expected to, I don't see the Lions causing us much trouble.
The 49ers will win, however, -7 points might be too much trust on Brock Purdy. But I am not an expert hehe.
But if I am asked which of these underdogs might bring the fans the upset, it might be the Chiefs, I reckon. Patrick Mahomes during a very importsnt game against a better team is the type of challenge that brings the very best out of this type of player.
In any case, for the superbowl I want the 49ers and the Ravens to win.