to be honest though drugs CAN fuck up life, it's about how you manage your addiction though.
if you can do consumption breaks for some weeks totally sober multiple times, you are in control of your addiction.
doing speed and coke and weed for the last 2 years and it didn't affect my personal nor my career.
it's shortening my life, but i don't really want to live longer than 65 years anyway. and i will most certainly not keep my current consumption forever.