I sort of agree, because no one should be shamed. The issue I have with the statement is that current "trad wife" trends are at best exclusive and at their worst completely toxic. I definitely don't want to see that either.
Let's just leave it at: let every woman choose themselves and make it as easy as possible for those who do want to do paid work.
Assuming you work from home the real answer is that you just get up every few minutes and move. It doesn't matter what. Some squats, pullups, pushups. Even a few hundred steps works wonders.
The key is to make the barrier to entry as low as possible. Then you actually do it more often.
Besides that, find a sport you think would be fun. Just try a bunch of trial lessons or join some people you know.