Just to establish some credibility, I worked in the golf course business for almost 30 years. I read the entire string on this subject and noone talked about proper mowing. Most golf course grass–greens, tees, approaches, fairways–are maintained at an unnatural height, even for those hybrid grasses. They stay healthy only via intense turf management (fertilizer, chemicals, aeration, water, etc). The best way to have a healthy lawn and minimize all that stuff is cut your grass at a height of 2 3/4″ to 3 1/4″, no shorter, as often as you need to to avoid piles of ‘hay’ in your yard. Don’t water too often, but thoroughly, to establish deeper roots. Healthy grass overcomes most weeds, dog spots, etc. Light fertilization 2 or 3 times/season is all you need. Years of neglect or problem soils may require more intense correction, initially.
The shorter you cut it, the more you have to baby it.