Your average family farm of 50 to 200 acres would have no problem with pollination. In fact most crops, like almost all fruit trees are thinned due to too many fruit being set as it is. Many family farms around here have no problems with native pollination. (Unless they killed them all by chemicals.)
Honey bee pollination has much to do with shape and perfection of the fruit, and with few exceptions, has little to do with number of fruits given. If you ever seen a lopsided apple or lopsided pumpkin, where it is big on one side and smaller on the other, that is poor pollination.
Many family farms around here do not get honey bees for pollination. They have farms with woodland, open Fields, and diverse landscapes around the farms. They have many pollinators.
The dangers with being dismissive of the importance of honey bees however, is IF you have something kill off the honey bees, you may be talking about massive losses to the native pollinators as well. But with every bad thing, something new and better will come forth. Many abuses to the environment can be attributed to the ability of farmers to bring in bees for a few weeks just when needed.
Without the honey bee, a new awareness and perhaps better practices of protecting all pollinators would be seen. If not, some farms will fall by the wayside while others will adjust and move forward. I hate to say it, but by beekeepers providing bees a couple weeks a year, we feed into the ability of farmers to over spray, use much harsher chemicals, and be totally ignorant of the environment the other 50 weeks of the year.
Certainly for the seed crop industry as well as the mega-mono-farms, pollination would be a major problems. In some areas, farms are so large the plantings can be measured in square miles. Pollination, if not for bees being brought in, would be nonexistent. So farming practices, and the ability to feed the world, which is what mega farming does, would need to be changed.
As with many things, extreme comments and poorly painted pictures are fuels by agenda driven, and sometimes just plain ignorance. No, we will not die within three years of the honey bee disappearing. Farming practices would need to be changed, but crops will still be grown. Yield would go down, quality would go down, and farming practices would change. But it would not be the doomsday scenario that some portray.