Yogurt/kefir occupies very large segments in most developed countries' grocery store shelves and new brands/varieties pop up every year. How has this industry not collapsed if "a lot of people outright refuse yogurt" according to you?
The development and marketing of lactose free dairy products in recent years is simply the dairy industry exploring new market segments, because substantial portions of the population do not have lactase persistence. Even societies whose culinary traditions involved heavy consumption of dairy do not have 100% lactase persistence. It's not some weird conspiracy aimed at making modern humans "weak". The lack of lactose is not significant enough to change the nutritional content of dairy products.