Something could go wrong with any of those and cameras can be pretty light these days since we put them in doorbells, so I doubt they're sweating it when there

Something could go wrong with any of those and cameras can be pretty light these days since we put them in doorbells, so I doubt they're sweating it when there are multiple potential benefits to having it there. :) Curiosity weighed almost 2000 lbs, so it's not like rovers on Mars are afraid to weigh anything which is not to say they don't run the numbers.