Do the wild bees make good honey or are they just disease carriers. Do beekeepers put them in to a domestic hive or not or are they just smoked out and left to die?
There are many types of bee. For example, the large 'fluffy' looking ones you see in the garden are bumble Bees and the bees that make honey are Honey Bees.
Some bees are solitary bees, but yes, you can get 'wild' Honey Bees. These are often bees that have swarmed from a hive and then set up home somewhere of their choice (for example, Dove Cotes, chimneys, tree hollows).
Many swarms go unnoticed but if they are in a place where they are not wanted, someone like me (a beekeeper) is called out to remove the bees and rehome them. I would then take the bees and safely rehome them in one of my spare hives.
With regard to disease, yes, disease can be transmitted from bee to bee and from hive to hive, for example, they can carry mites. Beekeepers buy the approved medication for the bees and treat them accordingly.
Beekeepers on the whole are responsible folk and we care greatly for our hives. We give the bees ample room to expand, treat with meds to keep them healthy and feed them when the forage isn't good. We make sure there is a water supply that they can access safely, and protect their hives from danger (for example from animals that might knock the hives over) and the elements.
I haven't gone into any great detail here as there is so much more too it, but I hope this reply gives you a bit more of an understanding as to how valuable bees are to us all.
It is very important that we ALL are considerate to ALL of our wildlife. Every little helps.