Some do! It looks like they are making an aggressive point about their right to do so. I have seen women choose the central point sit down and remove their clothing, looking around to see who is looking, glare and shout about what they are doing.
I agree with Closetheblinds that she can and should be able to happily walk around doing her thing, but I bet that she is not going out of her way to show everyone what she is doing.
I absolutely agree that women have the right to breastfeed wherever and whenever baby needs feeding. However, in my local area there's a small gallery with a small cafe, about the only nice place to go other than grotty greasy spoons. It has a long shared refectory table for 12 in the middle and small individual tables for 2 and 4 round the sides. There's a woman who comes every day, plonks herself in the middle of the refectory table regardless of whether any other places are available, glares around the room, and shouts out she's going to breastfeed her baby and if people don't like it they can leave. She then proceeds to get out both boobs and start feeding.
So far, so good. But if the other tables are full and people come to share the refectory table, she starts accusing them loudly of perving. I have seen people get up and leave because of her. The walls of the cafe are decorated with local artists' work which is for sale and people are encouraged to look and maybe buy, but if anyone does look around the room, she accuses them of perving at her. Does she want us to sit heads down staring at our plates?
This is most unfortunate. This one individual is indulging in performative breastfeeding. There are plenty of other mothers who come in and breastfeed, and no one else either the mothers, staff, or customers have any issues. Now when we go to the gallery - a group of pensioners, mainly all women, occasionally one or two DHs in our group, we tend to peer round the doorway and if she's there, we forgo our treat and just go home and have a cuppa there.
As I said, I will defend any woman's right to breastfeed whenever and wherever, and if you check my other posts, you'll see they're not the goady sort, but please don't say that there aren't a small minority of militant women who make their breastfeeding an uncomfortable issue for other people.