"TR" plugs are another "innovation" that someone got a patent on and then lobbied to get into the NEC. In my experience, their only functionality is to bend up the prongs on plugs when the plastic bits choose to not get out of the way.

Why should everybody have to pay a continuing overhead simply so people with small children don't have to install outlet covers?

If you're actually concerned with electrical safety, you're much better off installing solid "commercial-grade" receptacles than pretending that garbage-grade ("residential") has been rendered safe by being more difficult to use.