A great question...my answer is simple...

1) In Ontario a crossbow counts as part of the archery season so I get to hunt additional time during the archery season
2) Additional tags are available in many areas during the archery hunt
3) I dont have a whole pile of time to practice with a traditional bow to add to the many other hobbies I have. An excaliber crossbow is so accurate, it is like shooting a rifle...yes, you need to practice your shots at different ranges, but nowhere near the time people dedicate to becoming good archers with traditional bows.