There is asbestos in the insulation of much of the older wiring. It is impossible to know if you have asbestos wiring without a microscope operated by a trained individual. Photos won’t tell you because many things look like asbestos and vice versa. Most asbestos containing home material is a combination of cellulose, synthetic fibers, and potentially asbestos- all mixed together in a single product.
As far as the hazards and consequences of exposure to asbestos (or plutonium), you have to weigh the potential risks vs the benefits and make that decision for yourself. It’s true that multiple exposures (occupational) would be more hazardous and doing a single job would invite less risk. Some people are more susceptible to the consequences of even lower exposures. It’s really up to your personal risk tolerance (and there’s the question about disposal).
I do agree that the electrical hazards are far outweigh other risks of this job pose the most immediate risk but to be cautious by minimizing asbestos exposure is not without merit.