can you grow good bud from not so good beaners?

I'm going to side with nurture over nature.
Yes genetics can affect a lot, like node spacing, leaf structure, nutrient uptake, preferred ph, flowering time, and maximum size.

But there is way more that you, the grower, can do to take that bud to the max. By growing in smaller batches you can give each plant all the attention it needs to maximize potential yield.

Grow bag seed, harvest dank nug!

A lot of commercial guys grow big bud,Chronic,AK 47 many other good strains by the time the compress it all or all the other bad shit they do(You could write a huge thread on that alone)The weed is shit.

It's not so much the stone either, because I've gotten totally twisted off mersh. It's the taste