Tiny needles make it pretty easy, if you can do phlebotomy you can shoot up with a 31ga needle. I was in lab tech school in the military and ended up shooting dope sometime in the 00s, but stopped before I got in any serious trouble. Those people who have to hit weird veins in odd places because they’ve ruined the rest blow my mind though. I guess if it’s between that and being dope sick it’s worth it in the short term.