Context is king.
If people have a problem affording food now, being told to grow/raise their own by someone with:
- a garden / space
- set-up money
- probably staff
- education / know-how
- low crime area
- no delay because production already exists
- etc.
is not remotely useful.
It's a form of "let them eat cake" comment, from a privileged twit with no conception of what millions of her fellow citizens have to live with, and for whom this is a impractical thing to do. As usual, it's also likely to be least practical for the people with the most need, i.e. the poor.
If a politician wants people to grow their own stuff, then they need to
create a system that facilitates them doing so. Otherwise they're just some pompous prick fobbing off problems with nonsense.