I agree with you.   I might add the Sabbath is less of a societal burden than it used to be.  We hung together because the Sabbath made ongoing social interaction with non-sabbathkeepers awkward. 

Medical work gave you an exemption from Sabbath-keeping and that made it attractive.  Why not? It has been a very economically dynamic sector in the marketplace with lots of jobs.  If you wanted to feel righteous about it, you could consider it a divine calling, the medical work is the right-hand of the gospel...