I don’t think it’s wrong to discuss any unnecessary pressure the sport puts on her, or any other new mother - she discussed pressure to keep the rides and maintain the business she built, but there is also pressure around world ranking points (for no good reason that I know of, they are not frozen in eventing), etc.
The decision around how to manage her family is her own, and no reasonable third party should be butting in on that, but if she or any other new mother made a decision about returning to sport not because they wanted to but because they felt they had to, that’s absolutely something I’d like to discuss (perhaps on another thread) and something the sport needs to address. We are so proud of the level playing field between men and women. We’ve got to walk the walk.