I'm going to sound smug here, but I have good reason
certain members of my family and my then partner's were obsessed with weaning. Obsessed with feeding the baby, making them as fat as possible. My aunt was having children around the same time as I had DD, and her babies were all clinically obese by age 2. Of course the doctor who told her that "didnt know what he was talking about"
I was young and impressionable, but I was stubborn, and the daughter of an NHS nurse. The more i was bullied, the more i dug my heels in.
Just shy of 6 months, I tried DD with some sweet potato. She vomited it up. She ended up being almost 8 months before I tried weaning her again, and we had no problems. She is now 8 years old, chose to be vegetarian age 7, and eats everything except meat. Last night, I kid you not, she was munching away at a kale, melon and black bean salad.
As a baby, she was always a perfect healthy weight, yet I was told I was abusing her by not feeding her bowls of cheesy pasta, piles 8f toast, rusks in the bottle etc, all by 3 months old. It didn't help that she was exclusively breastfed, which they found disgusting.
tldr: people go utterly batshit over weaning. I never understood why and I still don't. Obviously a kid isn't going to be on milk when they are 18. But i could tell you so many stories about how utterly mad these family members glgot over it