I fully understand the issues with the logistics. I get that the delivery people are often held to unreasonable standards and forced to insane expectations of quotas.
But, when there are 3 cars in the driveway, the lights are on in the house, and it’s the middle of the afternoon, it is absolutely the delivery person’s responsibility if they don’t even knock. They don’t even need to stick around more than 5 seconds, at least actually make the attempt.
Until you start selling a 1/3 lb burger to outcompete the 1/4 lb burger, but people are “4 is more than 3!” so your marketing fails…