Boston qualifying is easy for some, impossible for some, and everywhere in between.
I could run 10.05 in HS as a baseball player that only ran one 100m race to see what I could do. No training, no specific speed work, just chasing down fly balls and legging out infield singles. For me that was easy but I know I'm an outlier.
After my 5th marathon, as I approached 50, I was finally able to qualify for Boston and it required a lot considering my work (C-level) and family (married with a young kid) obligations.