It's already a huge problem. Post-op infection is common and hard to treat. There are new approaches in use to reduce risk. I recently needed to have surgery.

A preventative measure was a gown with ventilation ports. I was told circulating warm air over the body surface has been shown to reduce post-surgical infections. As well, in the hospital IV antibiotics were administered as a further precaution. Fortunately for me I escaped infections, but a number of people I know did not have as favorable an outcome.

As you point out, using disinfectants is not a new idea. Readily available materials other than bleach are effective and not as malodorous or irritating as bleach. Hospitals are usually pretty careful about that, there are always mishaps, chance of carelessness, infections are hardly rare.

By all means avoid surgery if that's feasible. If not avoidable, may we find an excellent hospital with great, dedicated staff and be blessed with generous insurance benefits. And of course, one can never have too much good luck.

Hospitals generally don't use bleach as a multipurpose germicide/virucide/fungicide as it is really bad at doing that, they use an specialty chemical solution that can kill things that bleach won't.