they come in several degrees of "doneness"
I prefer mine toward the crunchy side...
...but not quite brittle.

They rip open because the home-made weiners
have an exceptionally tough AND sealed
casing that splits when the internal pressure
of the steaming weeny gives way explosively.

Most hot dogs are intentionally designed NOT
to do that. depending on the brand, they may
have a soft outer skin, be cut apart, leaving
the ends slightly open, or slit down the side
to prevent them posing a hazard to the cook.