You can still get it because the virus infects the mucus membrane and lung tissue first, and then spreads into the bloodstream. The vaccine only protects the bloodstream, keeping most of your organs safe. That's why fewer people die when vaccinated. However, the vaccines are proving to only provide temporary protection, after a year or so they wear out. They are also causing the virus to develop better and better resistance to them, same as everyone taking antibiotics would do to bacteria. They also are experimental and dangerous. Our worldwide reliance on them will ultimately lead to more and more of these things being developed and crippling anyone who takes them longterm. Same as all modern medicine produced in the last couple decades, really.