I am the same. If people say someone has, "passed" I tend to ask, "passed what? Their driving test? If so, congratulations. A kidney stone? My sympathies they're painful, but glad it's out." 
When my mother died, lots of people commiserated that I'd, "lost her". I didn't lose her! I'm not that careless! She died. And I wept. For months. It's nearly 8 years ago now and I still weep sometimes.
Using plain, simple language is not an indication of heartlessness. I feel your pain. I'll sit and listen to your grief. I'll hold your hand for as long as you want until I grow numb with the inactivity. I'll feed your cat and water your plants and dust and hoover when you have lost the will to do so, and remind you to eat and drink yourself, but I'll always use plain and simple language, out of respect for my dead mum.