Howdy,
You may not like it, and that's totally understandable, but to the average guy that wants to get his damn skates sharpened, most shops _DO_ suck. And there's no way, as a regular consumer, to reliably find the ones that don't. Particularly when its the standard thing like "Joey is the guy at Pure, but Billy sucks and Jill isn't bad but can't deal with weird stuff either. Good luck! May the odds ever be in your favor".
Oh, and then Joey leaves anyway because, surprise, working retail isn't a destination career for most folks.
Meanwhile, despite your obvious dislike of these machines, lots and lots of people are happily using them very successfully. Because they do a pretty good job and do it consistently.
You sound _EXACTLY_ like the typical machinist from 20 or 30 or 40 years ago when CNC machines were taking over. Manually sharpening a skate is an admirably skill. And, done well, you can get an extremely good result. But that takes lots of training/practice/feel and at the end of the day, there's not enough folks around that do it well vs. a hack job that destroys profiles, has edges so uneven you can see it with the naked eye, that nods their head when someone requests a roh and uses "the standard" anyway, etc. etc. etc. This is a process that begs for automation. The stuff about consistent travel speed, consistent pressure, etc. that it takes a while to get the right feel for is exactly what automation is good at.
edit: And in the beginning, where was the money for Sparx to build those free sample machines for the shops? I would imagine they weren't doing a kickstarter project because they decided to turn down big money investors. They saw a need, had an idea for a product that filled that need, and were able to successfully market it to the people that wanted to fill that need. And guess what... Those people were mostly consumers, not pro shops. Or at least they were, until pro shops realized "hey... Wait a minute. You mean I can teach someone to sharpen skates in 30 minutes? And the results will be good?"
Mark