Quite easy to understand if you think a bit about it.
Take these 2 scenarios:
a) Spawn, hide for 6 minutes trying to not get shot by 23872837 ranged players that will 1 hit you (or almost) and then you have to wait another 6 minutes to "play". Or spawn late and be instant homosex'd by skill-less cavalry players that only can get kills this way;
b) Spawn whenever you want, go full retard ignoring ranged, since you can always spawn again quickly, go into huge melee clusterfuck fights (good ol'times), encounter both skilled players and newbies, have actual tactics, and dynamic gameplay (1 objective vs several objectives), where cavalry is a rare sight, and whenever there is, they surely are gonna pay horse repairs so they avoid using horses anyway, etc.
It's quite easy and understandable to chose.
