Thank you, @gentlemand and @Kprawn for your replies!
Summarizing all said above, we can say that the field where human resources are needed most is the customer support.
I think I have an idea regarding how to robotize the process to the greatest possible extent. (I know it sounds too pretentious, but I can't find better words right now. Sorry). Correct me if I'm wrong, but I think that the biggest part of support calls refers to deposit/withdrawals issues. When a deposit/withdrawal is pending for too long, customers, especially new ones, think that something goes wrong with their particular case and contact support, while in fact the whole network is slow at the time. What if to program an auto reply machine to search for keywords such as "deposit", "withdrawal", "pending" etc. in the call, and reply with a link to, say,
https://www.blockchain.com/en/charts/avg-confirmation-time along with some words of course, but not with that We-value-your-input-and-appreciate-your-feedback bullsh*t, but invent something less annoying instead? And then, only if after a reasonable time the call is repeated, enable humans to deal with it? I think the number of the repeated calls can be 20 times less than that of the initial ones.
What do you guys think of that?