Indeed it would.
Handing people tools and "helping" gets them charged extra - or it always did when I was building custom computers; if the client wanted to be there and interject themselves in my work which otherwise would take about an hour or so the hourly rate went up just because of general annoyance the customer caused me while I was trying to do my job.
I know my dad and my brother both charge extra for mechanic work where the idiot customer wants to help. Plus an annoyance fee if they decided to try and "fix" it themselves and caused even more problems. Generally it keeps the idiots from being stupid and tinkering with stuff if you charge them extra for what they fuck up that you have to go back and unfuck.
In mechanics terms you're a dabbler if you figure out by following the manual and actually get something to run YOURSELF. You have to either go to school or manage to pass your certification process / an apprenticeship and get certified to become a mechanic.
EDIT: Much like one would assume a shaman would be; you go and learn from the shamans or the furies or whatever then you can call yourself a shaman when they say you can.
Except we aren't a customer. We were attending a minor ritual. and we were invited.
That last bit is important. It means we were at least trusted to not fuck things up.
It's less "customer X wants to 'help'" and more "Bob, your neighbour is fixing your bike as a favour so you'd better hand him that wrench when he tells you to or get out" and us choosing to recognize that the bike-fixing is a favour and being curious enough to stick around.