[FartyMcFarter]

This is just not true. For example, some bugs are so rare that you can't hope to reproduce them by just looking at "a live running instance". In this case, print debugging can be the only practical way to go.

[pjmlp]

Which is exactly what trace points are for.

More devs should learn about JTags, IntelliTrace, DTrace, ....

No need for manually writing printf-debugging and recompiling all the time, when the debugger can do that for you.