Very important to ensure that there is naturally occurring winter food available for wildlife, however, I disagree that it needs to be untidy.

Leaving some leaves down is fine, but too many leaves can harbour overwintering pests (slugs and snails for a start) and diseases (molds for a start).

A garden can be allowed to "rest" over the winter, without making it to become the neighbourhood eyesore.

One is unlikely to change peoples attitude toward encouraging pollinators, by making ones garden look unattractive and messy.

It is totally possible to have a beautiful winter garden, which provides food and habitat.