Pretty sure that's why a bill has to pass the house and the senate. One is proportional and the other is a nod to each state as a representative in the 50 state 'republic'
The House of Representatives isn't remotely proportional; it's still land-based. It divides the land into little districts, and then runs a FPTP election in each.
It's supposed to divide the land into areas such that each has about the same population.
It's not even remotely close, and that's why the system is so broken.