Antibiotic Resistance Concerns

Only if antibiotic resistant bacteria don't kill us first.

Unfortunately due to antibiotic resistance, no :(.

Antibiotics must be used rationally. Bacteria evolve surprisingly quickly. They can and will develop resistance to the medication. Depending on which antibiotic it is, the bacteria might already be resistant. Staphylococcus aureus is ubiquitous and resistant to common penicillins. In this case, all it will do is kill off all the non-pathological bacteria that actively compete with the resistant bacteria for resources, allowing it to spread over a wider area.

The bacteria have anti-antibiotics. We need anti-anti-antibiotics.

Antibiotics won’t work forever. Seeing drug resistant strains already.https://www.nbcnews.com/news/amp/ncna642161

Is this one of the causes as to why humans are developing resistance to antibiotics?

Sort of like antibiotics resulting in more resistant bacteria...

there's no reason to think that bacteria couldn't evolve resistance to these things, too.

I cannot confirm, but that sounds plausible. This is the same logic for using antibiotics sparingly and in manners that will maximize their effect, to reduce the rate at which resistant strains of organisms dangerous to us can mutate.

Generally speaking, antibiotics should be more controlled, to prevent breeding resistant bacteria. I.e., ensuring that the treatment is done in full.You might want to look for bacteriophage treatment, which lacks many downsides (at the cost of needing matching like donor organs, and thus distribution infrastructure).