Calling a human being is much higher-friction than just opening an app, if that weren't the case, we' all still be calling restaurants instead of ordering on Uber Eats.

I also would prefer not to call volunteers at night. This isn't much of a problem if you live in the US, as the app is segregated by language, not country, so you'll probably find somebody down under. I have an additional complication of having to deal with foreign language content because of where I live, so English often isn't good enough for me.