i ground where ever possible - and expect everyone working with
me to do the same. it is true that one must watch for devices
with internal connections to ground etc. (like with old G9S
safety relays which had PE terminal tied to one of power terminals).
the point is one should take this seriously, read the spec and
then check it out - before goes out to customer.
it is not professional to pass ticking timebombs... just closing
an eye on issues like this is the same thing...
do you stand behind your designs or hope that things will eventually
fall in places...somehow?
also there are engineers with mortal fear of not just grounding
but ground loops, analogs, testing circuits of their own creations etc.
these things are part of job, one can try avoiding them or learn
how to do them properly. grounding is part of electrical code in
every country that has electrical code. check if you work in such
country, get the book and read it...
as for industrial power supplies, i read the specs and use the
product to the letter, including grounding either of DC terminals,
shorting output etc.
what's the point in buying isolated power supply if you are afraid
of grounding any point (such as output's positive DC terminal for
example)?
what's the point in buying power supply with current limiting or
short circuit protection if you are not going to short it as soon
it's out of box and powered up? when do you expect this should
kick in and save the day? when you get accidental short three
years later and hopefully nobody remembers your name?