If you get caught, there's no plausible deniability. No way to pretend you just got confused, or that you were in a hurry and just marked "Yes" and signed without reading.
If you were e.g. applying for state welfare while living out of state, a forged bill with an in-state address would not get you caught, but may be crucial for proving ill intent if you get caught by unrelated means.
A lot of security measures add just that much security. It's easy to break, but breaking it removes plausible deniability.
Most home locks wouldn't stop even a person slightly below average strength, bump it with your shoulder a couple times, and you're in. But you can't then claim you got lost, confused, or thought it was your friend's house, or thought you heard someone say "come in". A surprised homeowner will be less hesitant to use available violence, and no court would believe you meant no harm.