Well, wasps can bite and bees can sting, can't they? Enough reason to not welcome them to my garden I think. To be honest I have never been sting by a bee but.... I hate when one disturbs my peace of mind while I am sunbathing because I think/fear it could sting me. I don't even like flies nor mosquitoes even if those won't bite me.
Wasps are dangerous and need to die by fire, but bees don't want to sting you as it is their last defense and then they die from using the stinger. Don't bother them and you can walk right through them. I had one queen Bee sting me when i was young but I sat on it! Damn that hurt.

If where you live supports bats then put up some bat houses and that will take care of the mosquito's. And making sure there is no standing water on your property keeps the mosquitoes and flys away as well.
Wasps more dangerous than bees? Why? I mean, I don't really know. To me both are just annoying when it comes to me trying to relax. No big deal though... But if I can have then away of my close proximity I am happier.
Avoiding standing water on my property is not possible as I have a big pool just side to the house... It doesn't seem to particularly attract mosquitoes (probably because I have it chlorinated and perfectly clean all year round). Also mosquitoes don't bite me (or if they do, which probably do, I don't get an itch nor notice anything).
I will consider the bats houses thing (will google about it) as I don't mind bats... But I don't think my GF will approve that. It already took me a lot of effort reasoning about the convenience of putting some geckos (which she strongly and irrationally fears/hates) "housing" on the outside. Maybe my dislike of wasps/bees is also irrational. Go figure. It's my garden though.
