I agree that if there were 5 cows being pastured on your land, with droughty sand. Yes you might lose the stand of dutch white clover.
While that is the use case for the website that you listed earlier, we aren't trying to run pigs or cow
or any animals. So our stand would survive.
Lets say we lost 50% of the DWC the 1st year, as the soil health increase a 2nd reseeding will only see a 20% loss.
Other than above ground animals like cows/pigs leading to stand loss, underground animal also have an impact. And by underground I am talking about nematodes. I recommend adding some garlic-chives
to the mix. Actually most plants in the garlic/onion family will suppress nematodes due to the allcin compound that they release. Mushrooms also attack nematodes esp oyster mushroom.
Personally I like a mix of 80% DWC and 16% Tillage Radish and 3.2% Chives, and the rest from the mint/thyme family. The grasses will show up by themselves.
If we broadcast we will need 50lbs of seed for $150 but if we drill seeding it will only need 5lbs for $50 due to better germination and survival rates (soil-seed contact). We will however need special equipment, fossil fuel and extra time, we also miss out on the natural selection process where only the drought tolerant seed germinate and survive for more that a week. Which we can quickly address by broadcasting a few more seeds if we see an empty spot.
Wild Dutch Clover Range