I do not accept that those reasons were significant for many people.
Your same Wiki page gives us the main reason.

"Recruitment in the first few weeks of war was high, but the real 'recruiting boom' began in the last week of August, when news of the British retreat following the Battle of Mons reached Britain. Recruiting peaked in the first week of September".[2]
" The timing of the recruiting boom in the wake of the news from Mons, though, suggests that men joined knowing that the war was dangerous and indeed many joined precisely because it seemed to be a threat to their home, district and country."