Yet those are the vary basics of lab and field research. While PIs generally have a budget which allows them to pay a tech or an intern to do those things, grad students are generally required to do these things on their own. Because these tasks are critical for research, the PI is required to actually know them all, and any PI who has not actually done them on their own at one point will have have problems making in identifying errors and artifacts in their own results.
Also, running multiple statistical analyses can be rewarding. Or so I’ve heard. From a “friend”.