If I have the clutch off or if it's been a long time then I'll inspect the clutch bearings and grease them.
However, some of the new factory bars don't even have grease ports. I've read that Oregon and some saw manufacturers now believe that tip greasing can actually shorten nose sprocket life because it pushes dirt and debris into the bearings when you grease the hole. As a result, some manufacturers now think the smartest approach is a sealed tip or greasing the bar when it's new before the first use, but then leaving it alone.
Do the work when the time opportunities itself!
Anyway, regarding bars...
It is subjective to when and where you use them.
The crux is that not all of us live in Phoenix or Seattle! In a dry area greasing or oiling will pull in stuff, in Seattle greasing or oiling pushes out water!
Manufacturers going one way or another is because they are serving themselves instead of offering what different areas need and tagging them that way.
In a large part because humans tend to be silly sometimes; they hear something is the best thing since sliced bread but do not take into account where it is used.
I guess that is rant off?