Why be "normal"?
Trust me, Not Buzz is not normal as evidenced by the chromatics of his engine bay.
The "frunk" contains the same heat that the lower hood vents deal with...or so I would assume having never actually sat in the frunk to see for myself
Not really. Traditional hood vents are placed in the area between the frunk and the radiator, allowing some of the air which has passed through the radiator to exit upward over the hood instead of forcing it all down and under the chassis.
The frunk OTOH, is an odd-shaped box which is loosely sealed from the elements. Hot air from the radiator does not pass through it. Venting the frunk may lessen the chance of your spare tire and brake master cylinder suffering from oxygen starvation, but that's about it.
It may not do the job as effectively as the lower hood vents, but it may work nonetheless...right?
If your purpose for adding vents to the frunk is for heat dissipation, I suspect that you'll be disappointed with the result.