The statement is polemic, no doubt. It is possible to be a first rate lab technician without considering the theoretical underpinnings of science. In fact, one of the legitimate scientists often listed as an ID advocate runs a cancer screening lab.
What the author of that quote means is that it is impossible to contribute new ideas to the science of biology without understanding evolution.
The Discovery Institute as much as admitted this when they backed out of the Dover trial. They said ID was not ready because it had no research and no research program.
"impossible" is a term I do not like to see used inadvisably, but I'll concede that that is a tenable position.