Do you realize the failure rate in sales is 95%? That means 95% of the people who go into sales fail and get out. This huge majority of nonperformers are usually the ones doling out awful advice to you and setting a poor image for the profession.
Many techs have bought into this image, believing somehow that sales is disreputable or they’re “above it” in some way and would never do that to a customer. Bad word choices all around.