to be fair,
one does not need to be able to do something or replicate what he/she suggests. the crux here is whether the suggestion is feasible or not.
Where I come from, people are valued on how they live up to their own words.
Of course she needs to be able to do what she preaches, how else would anyone believe her? If she can't even do what she is suggesing, it simply tells us that she is just full of hot air.