I always thought it was weird and unnecessary to use EIRP power limits on 60m vs transmitter output power (before feedline losses and antenna gain) as on every

I always thought it was weird and unnecessary to use EIRP power limits on 60m vs transmitter output power (before feedline losses and antenna gain) as on every other band. The TX power limits were primarily driven by builder/operator safety - higher power requires higher amplifier voltages. If there is a lower requirement for a band to avoid interference with shared uses, why not just specify a lower power level? Why add a requirement that involves antenna and near-field environment modeling?