[esbwhat]

The thing is that not all streets are created equal. On particularly dangerous corners there will be lights, and cars can come around the corner going maybe a bit too fast to stop, so it's important to obey them. When there is no light, that's usually indicative of a less busy street as well, where crossing at your own discretion is safer.

[mxfh]

As always, know you routes. It't arguably safe to cross 3rd tier roads with hindsight, yet anything higher in traffic hours is simply not worth it.

For the typical pedestrian commute through Berlin you don't even have to cross a significant number of lights, if any at all, when traveling by means of U&S-Bahn and know which side of the station you have to exit on.