Hmmm, I'm on the fence a bit with this one.
I understand the point that he's just celebrating his wife who has worked hard to stay fit even in difficult circumstances. And she looks wonderful. All credit to her. Even if you are wealthy, you still need to find the inclination to work out - not easy with a little baby.
But I think there's an element of tone deafness from Joe here, possibly due to the language he's used.
The insinuation is that anyone can get their figure back if only they were prepared to put in the work as his wife has, and that any woman who isn't in shape after giving birth clearly just isn't trying hard enough.
I don't know a huge amount about Joe Wicks so can't tell if it's just clumsy wording or if he actually believes that women have a duty to prioritise getting to the gym and regaining their waistline asap.
For clarity, there's nothing wrong with women who choose to start exercising and regain their pre-pregnancy bodies. Good on them.
The issue is the societal pressure for women to "snap back" after giving birth - the wellbeing of the mum and baby should be the priority. If it takes a bit longer to get back to a honed gym body, there's no harm done.