Perfect form is a journey, not a destination. Form is fluid and depends on the weight used, the training protocol, etc.
We hear a lot about using perfect form because it's important to work on your techniques. But let's have a little honesty by saying you never actually get there 100% of the time.
So you can handle a weight with good form. What if we added 30kg? What then? Form will be shaky. Can you do 100 snatches with the 16kg kettlebell with great form? Excellent! How about 150? Form that's excellent at 100 might start to break down as you reach 150. How could it not? You're reaching your limits. As you reach the limits, something has to give and form usually slips.
Workouts are workouts -- not demonstrations. Work on technique but realize it will slip slightly from time to time. And don't let that hold you back!