Player tables always prioritize Healers in RPGs like Dungeons & Dragons 5e for a reason. After all, D&D 5e's tactical depth can make "ordinary" encounters wipe out unoptimized or underdeveloped party setups. As such, players of Baldur's Gate 3 will immediately see the repercussions of parties built willy-nilly without optimization into the mix. Moreover, parties lacking a healer can easily meet their doom within the first few rounds.