actually with Uber app (rider/driver) also have exactly same problem. If you're in middle of no-where, and no landmark to tag, then we understand u just allow the app to locate u.
but if you have a landmark, why not just type in the location instead? keying in Hotel XXX is much much much better than allowing the gps to tag u as 1208 Jalan Tun Abdul Razak.
even the most noob drivers would know how to find a hotel/building instead of searching for lot/unit number.
experience driver would know from heart where the hotel/building is instead of relying solely on waze/maps to direct them to 1208 Jalan whatever.
even tho gps manage to locate u accurately, it still doesn't hurt to send a msg/note that spell clearly your location.
it makes life easier for both riders & drivers.

if u've not driven before, u won't understand the frustration drivers get when riders simply pick a location.

last friday, this lady selected wrong PUP...she's at Jalan Brunei but somehow selected Jalan Brunei Utara as the PUP. some more have the bloody nerve to tell me "i tot i tag clearly on the request i'm at Jalan Brunei"
bcos of that, i had to make u-turn and wasted 5 more mins to pick her and she had to wait another 5 mins when we can both be on the way 5 mins ago.
as a fellow grabber pointed, 1 rider 5 mins wasted. 10 rider 50 mins wasted. 50 mins can means RM50-60 income wasted.

agreed. we use the same phone to pick up request, navigation. if driving to unfamiliar location, relying on waze, suddenly call comes in, we lose direction immediately.

back in early uber days, i was on a job somewhere in Selayang. I have no idea where i am, only relying on waze. nxt ping comes in and the next rider called immediately "where are you? how soon can u get here?" i politely told him "as u should be able to see, i'm still completing my current job, and will get to you once i drop him off" and he immediately goes "in that case i will cancel" and he did. but he requested again and again his ping comes to me. again he called me!! asking the same questions!! only this time he accept i AM the closest driver and he's got no choice but to wait.

on the side note, a difference between uber & grab app. on B2B job, uber will hide itself in background after you accepted the B2B request whereas grab will instead push waze into background and bring up its own screen. i just feel its a little hazardous since we're driving and navigating. after hitting "accept job" still have to press few more times to bring waze back.