It still matters a lot what sort of building one is in - the VAST majority of tornadoes are F0-F2.
The reason tornadoes "seem" to target trailer parks is that the F1s and such are only doing serious damage in trailer parks - and a lot of "trailer park tornadoes" that do pretty visually spectacular damage are actually straight line winds or microbursts.
And your chance of dying in a trailer rolling along the ground is a lot higher than in a brick house that loses a roof.
On another note, no matter what you say on FR these days, someone will disagree.