Maybe so, although international managers have damageable egos too. And, whatever about pundits and fans, an international manager still ought to at least care about what the association, upon whom his job and livelihood depend, think of his performance and choices.
My theory about internationals managers possibly being fearful of taking a risk when other perceived "safer" options are available is actually somewhat based upon something I read in relation to the apparent reluctance of English clubs to employ black managers (on
page 112 of Soccernomics [PDF] in the chapter on racial discrimination):
Obviously, League of Ireland players aren't suffering racial prejudice, but their ability is seemingly doubted until a manager from England decides (perhaps reassuringly for the international manager in charge) to put faith in their ability too. Only then, do the players seem to get recognition. In the case of Brian Lenihan who moved from Cork to Hull, he received a surprise call-up as soon as he stepped off the plane in England.
Daryl Horgan and Andy Boyle were notable exceptions last season in being called into a final 23/28-man squad whilst still at Dundalk*, but, even then, as
I pointed out above, O'Neill had an ideal opportunity to go one step further and hand the ridiculously-in-form Horgan his debut against Austria, but declined to do so. Horgan would have been the first League of Ireland player to feature in a competitive international for Ireland since Shamrock Rovers' Pat Byrne lined out against Denmark in 1985.
*I acknowledge Dundalk goalkeeper Gary Rogers also made squads to play Oman and Serbia last year, but he'd already been in and around the set-up for a while as a convenient training keeper (despite being error-prone and nowhere near the best keeper in the League of Ireland), we were very stretched in the back-up goalkeeping department and the position is a bit of an anomaly anyway.