Yes. Space radiation doesn't kill 1% of gopros, it kills 99% of them (both numbers made up, but you get the point). Then there's the power budget. A watt is cheap here, not so cheap on Mars, so even what counts as "low power" on the surface of earth isn't cheap on Mars. And of course, n-item arrays need correspondingly more power than single items.

(I realise it's not your main point, but broadcasting 60fps video across the solar system sounds like it might need a LOT of power, no matter of sensitive the receiver is.)