I'm with hj, Most contractors that work in service work do their best to help people. I would consider anything else to be very unusual.
If questions aren't answered here quickly, a person shouldn't take it personally.
An answer given quickly without all the information may not be useful.
There is also the time factor. For most of us, this is donated time.
There is much we need to do, like everyone else.
We find little snippets of time when we can.
The people that post here do so with a good heart.
Just by reading their posts, I can see goodness.