Practically speaking, low-end mobos could just have an empty hole through the PCB for a power cable to go to the GPU from the power supply instead of soldering

Practically speaking, low-end mobos could just have an empty hole through the PCB for a power cable to go to the GPU from the power supply instead of soldering the connection and running all that power through the mobo. That power circuitry can't be easy to have around the chipset, right? Also, with this connector being so far away from the mounting brace to the case, would GPU sagging torque/bend/ this connector and all 600w of power going to it? A 600w GPU would have a big 'ol cooler and have big sag, right?