It is not harsh at all, It is a very valid and interesting question.
First of all; the Wexxians do not follow the Federation code of non-interference. Especially in the early years of Wexxian space exploration, they contacted every species they come across. And secondly; the Spec-Ops don’t interfere in all kinds of situations. Their mission on the planet they are stationed on is to learn of the species occupying it. They are stationed for life and consider themselves part of the species they are living with. Their concern is therefore always the security and safety of their hosts.
They don’t change the way of life or culture of the species they are living with, they are simply on the look out for dangers and try to make sure that nothing goes wrong.
If you one day realise how close you came to total annihilation a few days back if it had not been for that stranger who somehow managed to get you away from the railroad tracks in time, you might think that Picard would approve anyway.
The only species who know of the Spec-Ops are the Wexxians, they never reveal the true nature of their operatives, this is because they have long experience with biologicals, and how they mistrust both each others and the Wexxians’ motives. The panic and paranoia that would erupt if the Spec-Ops where ever revealed, would be devastating.
Therefore the Wexxians think that it is best kept a secret.
There are many ethical and moral dilemmas with the Spec-Ops, but the Wexxians have always had to make difficult decisions. And sometimes it is better to chose the lesser of two evils…
Right or wrong… the Wexxians stand true to their conviction. And hope for the best!