That red dress is great @frugal... I think it's from the Eastern Europe tour? I liked Kate's clothes from that one.
To clarify, I don't think she cares nothing for what she wears, she clearly cares quite a lot. And she's always going to be closely scrutinised for every detail.
But she's definitely trying to minimise some of that - the "work uniform", as discussed here extensively. No risks really taken, ever. Even the literal dressing 🙄.
Safe, conservative. Definitely not edgy. Even the Vogue cover, if I remember correctly, was panned a bit for her choice of safe, down-home country housewife gear throughout - nothing overly glam or daring.
And for the kids too. Their "work uniform" is to repeat the same clothing over and over - George's white shirt with the blue piping, charlotte's floral frocks, Louis' George hand-me-downs.