I think maybe the size of the plot may make a difference. A garden the size of Monty Don’s might offer so much food that no one floral area might get decimated - the menu is so big.
I had a couple of slugs on the astrantias when they were new, but none now, they've also had a little go at the penstemons, woody salvias, stachys, dicentra, nemesia, achillea, osteospermum, and foxgloves! They seem to love my margeurite but it's holding its own, and the big phlox is also winning.
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They seem to love my margeurite but it's holding its own, and the big phlox is also winning.