More than 3 out of 4 Americans plan to dine out this Mother’s Day, making it the busiest day of the year for restaurants. Behind that staggering number is a holiday tradition that has become more stressful, more expensive and less meaningful than the occasion deserves. The appeal is understandable. Mother’s Day comes with one unwritten rule: Mom does not cook. Restaurants have been cashing in on that rule for decades. The problem is that millions of families showing up for brunch during the same four-hour window does not produce the relaxed, celebratory morning anyone had in mind. The numbers behind the nation’s busiest dining day Mother’s Day and restaurant dining have become nearly inseparable. Surveys consistently show nearly 8 in 10 Americans dine out on Mother’s Day, with roughly 43% using a restaurant to celebrate in some form.…