Hello. I'm in a debate with my girlfriend and need some advice. Should someone still get tested for sexual diseases and infections even though they are taking antibiotics? Or taking antibiotics override the need to be sexually tested?

My girlfriend, who is a nurse, says everything being tested in a screening is curable with antibiotics and says std/sti screening are pointless because of such. She's knowingly had an unsafe partner who has lied about his other partners multiple times and has continued to engage in sex with him before/during when I came into the picture. They were having threesomes, gangbangs, and he was arranging her to have sex with strangers. Then she got cancer, but still kept sleeping with him during and after. He was even caught exchanging sexual favors for drugs and was in the news. When she caught him lying about how many partners he was seeing, again, she didn't get tested. She says it was because she was taking antibiotics and didn't need to get screened. Whatever he could have given her would be killed by the antibiotics.

Me, on the other hand, I have a history of std/sti screenings since 2019, have been tested 4 times in the year we have been together, and got myself tested when she told me her partner was lying to her and was sleeping with 2 additional unk people.

Her arguement is since he's an anesthesiologist,l and he has to be safe due to his job requirements even though she hasn't seen any results. Sti/std screenings don't mean anything since she was taking antibiotics for something else health related and those screenings don't detect stuff like herpes and warts. She also can show no physical proof of prior testing as she says her previous screening results were given over voicemail.

To me, her arguements are assumptions. I'm trust but verify. I believe she is clean, I wouldn't be with her if she wasn't. But I still think there is a purpose to going to get tested and knowing for sure