Yes and no. Advice can be friendly as long as it is assertive rather than aggressive. After all, it’s an recommended opinion, not an order, and it is given out of care for the other. And the whole beauty of advice is that it is totally up to the recipient to “take” it. Advisors are everywhere! Your own parents, college advisors, clergy, psychologists, school guidance counselors, doctors, lawyers, Dear Abby and the late Ann Landers, certain news-team personnel (namely, meteorologists/weathermen, traffic casters, health reporters, and consumer watchers), the list goes on and on.
However, it’s not friendly when harsh and caustic, and when it’s likely to NOT be accepted.
In a nutshell, advice can be either way, but is done because one cares.
oxymoron: a figure of speech by which a locution produces an incongruous, seemingly self-contradictory effect, as in "cruel kindness" or "to make haste slowly."