How old is too old to breastfeed

I was watching a video on YouTube and in one part the mom was breastfeeding her two year old, all the comments where talking about it.

“Once they can eat solids they don’t need breastmilk” “Once your baby has teeth it’s time to take them off the boob” don’t, don’t most babies get teeth before 1? And they eat solids before one. And they still *need* formula or breastmilk, until they turn one.....that argument isn’t clicking in my head.

Thinking 1-2 is too old is weird to come, considering it’s recommended to go to two. But under 1 is wild and I don’t understand it at all since baby still nutritionally needs it. Wondering is this is a popular opinion people have.