No that's wrong, worth comes into it along the line.
Originally Posted by paul ron
Yes having a go at a $10 camera / shutter is one end of the line but having a go at a more valuable lens/shutter and causing damage that would inflate the cost of a proper CLA is the other and we all have different cut off points.
It's not about putting people off from having a go, far from it, it's more about having some sense to how & what you do, and having a fall back for failures. There's a few websites with details of shutter repairs/servicing but not enough to be really helpful.
There's nothing worse than buying a good lens where someone's done bodged shutter repair.