Let me start off by saying that YES it is so fucking frustrating seeing Dom and Wendell literally trail blaze everyone else for another episode straight - i was really excited to finally see women on a reality show come together and work cohesively... BUT...
Kellyn literally gave Laurel not one, but TWO votes the last episode, whereas Dom and Wendell have both been so loyal to her and made sure she was safe. Laurel had more trust with the 2 guys... that's understandable.
Moreover, Laurel knows Wendell has an idol. You can make the argument, "well surely if she knows he has an idol, she would blindside him." True. But what if she actually did vote Wendell and he ended playing the idol. He stays safe. She loses Wendell and Dom by default. She's pretty much fucked for the next vote. She clearly thought through that scenario.
No matter how you look at it though, Laurel is still in the same position now than she would have been if Wendell was voted out. Ang/Kellyn/Chelsey would have all taken each other to F3 other Laurel anyway, so...
Long story short. Yes it's very fucking frustrating that she didn't make the move. But you have to not judge the player's decisions as a VIEWER, but instead put yourself in their shoes and try your best to assess the situation somewhat similar to the way they would have done when they were on the island. People need to be less butthurt and use a bit of common sense really.