Industrial targets were also pretty hard targets.
Well, the massacre was already happening. At Sobibor, there were rarely more than 600 prisoners in the camp at any one time; 200,000 to 250,000 people were murdered in the time it operated, which was from about May 1942 to Oct 1943, about 520 days. The massacre was already occurring at a rate of 400 to 500 people per day.
It stopped operating when there was a prisoner revolt and mass escape in 1943. About 60 of the 300 prisoners that escaped survived the war, which is a much better survival rate than remaining there. Belzec had about 7 survivors out of the 400,000 to 430,000 Jews who entered the camp.
Sobibor was an extermination camp covering a few hectares. So was Belzec.There was an uprising at Treblinka, a similar camp. These are not comparable with a massive complex like Auschwitz which covered many square kilometres, excluding all the satellite camps.
There were many survivors from the Auschwitz complex, it did not exist solely as an extermination camp, though it did operate in this capacity.
Who knows what a German reaction to an armed insurrection in the camp would have been? They may have just liquidated the resistance and the barracks from which they came. They may have liquidated the entire camp from which the uprising started. They may have accepted the economic consequences of liquidating the entire complex. The only sure thing is that any insurrection would have been ruthlessly, bloodily and successfully repressed by the Germans.