If I remember correctly (and admittedly it's been a while), Sybok shows Spock his birth scene and Spock just stands there saying nothing. Then, after Kirk tells Sybok to take a hike, Sybok looks expectantly at Bones and Spock, and both refuse him, which is when Spock says that particular line.
I don't think you can infer that, because Spock is silent, he agrees with Sybok until Kirk changes his mind.
The technical side - the movie-making aspects, that is - is more objective and can, in this case, be safely panned
Really?
Everything about the production is plain terrible: cinematography, camera work, lighting, costumes, sets, effects, sound design etc.
I disagree. The whole "I need my pain" scene is visually beautiful and atmospheric. The costumes and sets are fine (Nimbus III is
supposed to look like a shithole). I've never even noticed the sound design, so it can't be that bad. A lot of people list the soundtrack as one of their favourites.
The effects are famously problematic, particularly the ship shots. But there are actually a couple of nice shots in there (e.g. the Enterprise against the moon), and the effects do the job of telling the story. I mean, they are all at least on par with TOS, and there's nothing jarringly bad, e.g. mishandled perspective, shaking of picture elements, crude models.
Well, that's the thing - I like
bits of it. TFF has huge problems, to do with inappropriate tone and plot holes, that mean it can't be called a "good" film. But when fans dislike the movie so much that they refuse to recognise
any good elements, I feel I have to put the other point of view. This is the same reason some people have the impression I am a huge JJ fan.
EDIT: There's also the fondness one develops over time for loved ones who are flawed: relatives, friends, pets, scifi franchises.