Why Does It Feel Like Poor Play Is Acceptable (I'm Venting.)

[winsock]

I can hold John accountable because he came into level 70 content and could not perform the very basics of his job description regardless of his “circumstances”. Again, there is a HUGE different between John in level 15 content and John in level 70 content.

Could you elaborate on this huge difference?
If i instruct someone with "the very basics" in sastasha, keeping it as simple as possible and expecting minimal performance, I might say: run into a group and use flash X times.
If i instruct someone with "the very basics" in Ala Mhigo, keeping it as simple as possible and expecting minimal performance, I might say: keep shield oath activated, run into a group, and use flash X times.

Is mentioning shield oath such an inconvenience that you cant be bothered to assist people after level 30?