They make AAA RPGs. They kinda have to make combat a central pillar of their game design. You're not selling a main character diplomat. I'm just grateful they give a damn about your character's dialogue in the first place, unlike the other AAA WRPG maker.
(It's also worth pointing out that they did begin on Shattered Steel, for all that there's probably no-one left from that incarnation of the company, and very few who remember the days you could claim to have played it in your profile on the several-generations-back BioBoards).
Musing on BioWare's protagonists and how they came to end up being fighters, it's kind of interesting.
Gorion's Ward: Adventurer by circumstance (birth)
Hero of Neverwinter: Adventurer by choice
Does the SoU/HotU protag even have a title?: Adventurer by choice
Revan: Soldier of some description (choice or circumstance)/Jedi Knight conscript & Revan (birth)
Spirit Monk: Martial artist and adventurer by circumstance (upbringing & birth)
Grey Warden: Conscript by circumstance (life event)
Shepard: Soldier by choice
Hawke: Adventurer by circumstance (life event)
Inquisistor: Adventurer/Overlord of half the continent by circumstance (life event)
Pathfinder: Presumably soldier by choice
SWTOR & Sonic: lol
I remember all the discussion about how ME might represent a corner turned in terms of rejection a 'Chosen One' RPG archetype, reliant on an old boring/outdated/aristo-monarchical construct, because your character chose themselves by enlisting. Seems to me like the ME1/DA:O period might indeed have been the turning point, but it was merely away from your calling being innate (and even then NWN had already bucked the trend), rather than necessarily toward heroes entering themselves in the lists, as it were. Which is fine, I think, but interesting to note in retrospect.