Cracked Valve Guide Pillars - OK to Use?

It’s half assed work.

It’s nice to think all shops would do equal work, but just as in any other profession........ that’s just not how it is.
Some people are better at their jobs than others.

In your situation....... while the appearance of the work there leaves something to be desired, if you weren’t having any problems with the heads before...... and there is nothing mechanically wrong with them....... you can keep on running them.

Honestly......... I see **** like that all the time.