Dough is sticky when it is not properly kneaded OR if it is a high hydration dough (=/>70%).
If you are working with doughs around 60%, they will absorb the liquid and can be handled without sticking to everything.
These videos demonstrate the proper way to knead dough. Note the dough starts very sticky, but firms up.
A high hydration dough cannot be kneaded since it will not absorb all the liquid. So a something like a Stretch & Fold technique is used to develop the gluten.