While it was true that western lands were somewhat more fertile than the now-depleted lands of the East, many of the pioneers were attracted to the frontier in order to speculate in land, i.e. to purchase large quantities of cheap government land and to sell it at a profit to later comers
They wanted European powers to end
Gypsies, Freemasons, Jehovah's Witnesses, Homosexuals, the mentally and physically disabled, the terminally ill, Communists, liberals, and socialist.
The posting would not be in violation of the clause because there is a learning purpose to the items.