You can reasonably assume that some NBA players are using PEDs. However, the effect is different. To be an NBA basketball player you need to have several attributes, such as height and hand-eye coordination, that cannot be affected by PEDs AFAIK. If basketbally are using PEDs, it is probably to recover faster, which means coming back from injury or training more. More training can lead to a higher level of skill, but it's a second order effect. It's not like cycling where, for example, EPO directly affects performance on the bike.

yes, but those epo-esque drugs aren't exactly trivial to use these days. the testing process makes the doping process much more difficult for drugs that have these direct performance benefits.

recovery help is where it's at these days i expect, in most sports.

Look at all the incidents of blood clots or DVT in NBA players and it starts to look pretty suspicious.