Personally I believe there are effective ways to practice and ineffective ways to practice. I mean, why do you seek out teachers and ask for help on forums? We are seeking to maximize the effectiveness of the techniques we use to develop our skillsets.There's no shortcut to technical progress all you can do is practice.
Are there "short-cuts?" Perhaps not, but again, what I'm doing here is asking others to draw on their own experience and to provide suggestions on how to develop a certain skill, in this case, plucking speed with accuracy. Can I do it on my own? Yeah sure. But will just practice, practice, practice help me develop a skill if I'm approaching the tasks haphazardly. Maybe. Maybe not.
I've gleaned some good ideas on how to structure my practice to develop speed with accuracy. If I had not asked the question, I'd just bumble my way along. The suggestions help to open up a path to skill development using techniques that worked for others. In my case, working with a specific technique should create the conditions for developing muscle memory faster - over time and with dedicated practice - then simply bumbling along the best I can without a technical game plan.
So are there "short-cuts?" Maybe not, but some technical approaches may work better than others for developing a skill...for each individual. What works for one person might not be optimal for someone else. So you reach into you bag of techiques, try different approaches, and stick with what is the most effective for myself personally.