Not every beta backers is playing every available moment. Some are only dipping in occasionally after each update, play a few hours, raise a few tickets and then dip out, not wanting to risk tiring of it before release.
Even after release, some people will play every night, others perhaps only a few hours every now and again. I don't think the OP will really have to worry about a universe full of elite players on day 1, or even day 365.
I've been playing since PB1 and I only play a few hours every now and again. I don't feel overwhelmed against all the alpha pros that live in the game. But I did learn quickly how to stay safe, pick my fights carefully and build my wealth steadily. Those rules will still apply long after release day.