You see some guys that have mad knife skills. That can take a knife in hand, swish it faster than the eye can follow and make a perfect cut. They do amazing things with window tint. I am not one of those guys.
I mention it because laying down vinyl dry with out bubbles is a like mad skill. I still get bubbles sometimes, but not nearly as many as when I first started. I've seen others that are near flawless. It is hard to define as one thing. You just become aware of when a bubble is going to hit. Some of it is your squeegee technique. Many of those bubbles in your picture I suspect will air out and flatten given a day or two. If you have a huge bubble, poke it with a needle and press it down to get the air out.
But yes, wet install can reduce bubbles, or allow you to chase them out with a squeegee easier. But I hate wet installs. You will get better with each one you do.