Yes, but not all clients expose dependent tasks (which is sadly a common issue with open standards: they aren’t always properly implemented). I’m using Tasks.org on my phone (which supports dependent tasks), synchronizing to a Nextcloud server with the Tasks app (which supports dependent tasks now, but didn’t for a long time), which also syncs to Thunderbird (which does not appear to show dependent tasks as dependents).
Edit: remembered that the Nextcloud Tasks app has long supported dependent tasks. I was thinking of recurring tasks, which it does not support. Again, open standards aren’t always fully implemented.
I did some quick searching and found 2019 data from Europe. In all of the EU that year, bicycles killed 19 pedestrians while cars killed 3200 pedestrians. Over 168 pedestrians killed by a car for each killed by a bicycle. I know there are plenty of irresponsible cyclists, and yet they are still a tiny fraction as dangerous as a driver.