I'm curious as to why you think suttas should come after people have the basic concepts understood?
The best introductions to the Dhamma that I have found tend to explain the concepts in parallel with the suttas, blending Buddhavacana with modern commentary.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead" - Thomas Paine