They used to. But there were a number of problems - global customers (requiring 24 hour service centers, around the world, which is a huge expense, and not necessarily staffed with people intimately familiar with the product), customers with unique problems (hard to show a screen shot or give a sample file on the phone), language difficulties (trying to confirm a serial number from someone with a thick accent at either/both ends of the line), "customers" without an active support contact trying to get free help (phone numbers usually become public quickly), and on and on.
The best way to get phone support these days is from a reseller. They will be in your time zone, more than likely specializing in any local industries, and willing to do the legwork to track down a contact for anything they don't.
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If you are going to fly by the seat of your pants, expect friction burns.
"I don't know" is the beginning of knowledge, not the end.