Joe,
I too wondered if bloody urine meant bladder cancer. So I searched.
Healthline lists 42 possible causes for blood in the urine, and ranks them from most common to least common. Their ranking process is a bit shaky as it sometimes focuses on a precise single issue and then combines a number of unique situations into one heading.
There is general agreement (from my reading) that blood in urine is far MORE likely to be caused something other than bladder cancer. When we focus on bladder cancer, we can be misled by the constant linkage of blood in the urine to bladder cancer. People researching kidney issues also find constant linkage of bloody urine being due to a kidney problem.
Healthline ranked bladder cancer as the 8th most common cause of blood in the urine. Assuming they have the order correct, and assuming the only known fact is "blood in the urine", then, statistically, MORE than 91 % of the time the cause of blood in the urine is NOT bladder cancer. This is the best we can conclude from ranked data.
In the real world, given how common some of the more frequent causes are, it is quite possible that blood in the urine is caused by bladder cancer FAR less than 1 % (one percent) of the time.
The important point is that blood in the urine CAN be an early sign of a major health problem and it must be investigated.
www.healthline.com/symptom/blood-in-urine
Best
Jack