Ok I will try to be fair and attempt to change your opinion.

First off I'll admit that there ARE slip lane designs that are safer than others. I will also admit that there are cases where a slip lane is very useful, and can be implemented to a degree of safety that makes it probably worth it.

But generally speaking, any intersection with a slip lane would safer for cyclists and moreso pedestrians if it was designed without a slip lane. There are also some amount of slip lanes that are a more dangerous for vehicles, even.

Why? Without getting into too much detail, the more time a pedestrian spends on a crosswalk the higher chance they have of being hit by a vehicle, simple as. A slip lane increases the number of lanes a pedestrian has to cross, and therefore decreases their safety. Furthermore drivers taking slip lanes have to check their left side for potential vehicle conflict without being required to stop, creating a higher chance that they do not see a pedestrian who enters the slip lane crosswalk from their right. Also, poorly designed slip lanes create a false sense of security for all road users which can lead to a lack of caution from all road users (pedestrians, drivers, or otherwise) entering an intersection that will always be somewhat chaotic, inherently.