How about trying to see that effectively banning breastfeeding in restaurants by banning babies sets women back many decades? Do you know how long and hard women fought for the right to breastfeed in public?
Ok, I'll bite - let's run with that.
Anywhere that children are prohibited from being (except a place where a woman works) is prohibiting them from breastfeeding and is therefore discriminatory against all women.
Where are children prohibited from? Certainly, the leisure industry is guilty - nightclubs, theatres, cinemas, wine bars, hotels etc.
So, there needs to be a wholesale change in that industry and leisure businesses must open their doors to children. That will significantly reduce the market, as less tolerant customers choose not to spend their leisure time in a child friendly venue. That in turn will reduce choice for those customers, with and without DCs, who are willing to accommodate the presence of children during their leisure time.
The theme park industry would change as they currently discriminate against breastfeeding mothers on their 'adult only' rides. All three parks would therefore be entirely child friendly and would lose the lucrative hen/stag-market.
Vaping lounges would have to allow children in so that breastfeeding mums are not discriminated against.
Fitness centres and swimming pools would have to ensure all sessions were open to children.
There is a large and lucrative market currently meeting the needs of those individuals who do not want to spend leisure time with DCs.
If it became illegal to exclude children, many of those people would sacrifice their leisure time rather than spend that time in a space where there are DCs.
I acknowledge that to you, those people are dispicable. But there are many of them - which indicates it is not a abberation of a few in society, but a common feeling amongst many.
Are you so confident that everyone else is wrong and you are right? Or is it possible that neither position is wrong, and that with a diverse range of establishments, everyone can have their needs met?