My friend at work ended up in the ER and almost died because it was required (or she'd be fired from a job she's been at for 30+ years) and she couldn't prove she was allergic prior to getting the shot, (she knew there was a high risk, but her provider refused to write her the exemption paperwork, because they had no way to test if she was. There's now legal action, but that wouldn't help her if she had died), and then there are those who don't even find out they're allergic until the reaction. (For instance, when I got the J&J vaccine back in March of 2021, there was actually an observation area we were supposed to hang out in for 30 min due to the high risk of an allergic reaction). Not to mention vaccines are designed to provoke an immune system reaction, which is what allergies are.
Also many people develop allergies later in life. I myself have developed a minor allergy to peanuts. Luckily, it no where near fatal, but now if I eat peanut butter (which had been a staple of my diet for like forever, because I'm poorish) I have a really bad day.
Don't dismiss facts because it's inconvenient to your agenda. Statistically insignificant, perhaps. But if you still insist on claiming "never" you're not just an idiot, you're an asshole.