I think ya'll all obsess over plot predictability to your own detriment.
If all your story has is plot twists and unpredictability, then it ain't got much.
You might fool some folks into reading your story once, but they won't read it again or recommend it to others.
You need to write stories that are engaging and interesting despite predictability.
If you do that, then you can think about adding a plot twist or being unpredictable.
Watch a few episodes of Columbo. You (as the viewer) always know how it is going to end, and whodunit - every episode starts with the murder, and you see exactly who did it.
Why would you watch Columbo? You know the end after the first few minutes.
You watch Columbo because you don't know how he's going to solve it, and what mistake the killer made that Columbo used to crack the case.
Columbo is utterly predictable in its plot (Columbo arrests the bad guy,) but engaging none the less because you don't know how Columbo is going to pull it off or what other things will happen along the way.
Have you got something to say? Then don't sweat the plot twists or predictabilty.
I personally reject books that only have plot twists going for them. Once I've read it, and know the twist, if that's all you've got then I won't read it again.
Since it is hard for me to get books in English where I live, I tend to buy only books I know have more than just twist.
I explicitly read the beginning and the end and a spot in the middle of a book before buying. Exactly right - "spoilered" on purpose right from the beginning. I ain't got time for your book if it ain't got more to say than "plot twist."
I want stories that give me things to think about and challenge my concepts and attitudes. Those will still be interesting when I read them again next week or next year for lack of new books. Your plot twist is a one trick pony that'll land your book in the (small) pile of "oops, bought a crummy one, don't buy anything from that author again."