I wouldn't feel good about this game if I were LAL.
Hachimura has been a surprisingly important piece for them since the trade. Both offensively and defensively. Offensively because he is the only role player who isn't low volume / limited offensively and can put points up on the board. Defensively because his size, strength and quickness gives them that defensive versatility they have been using so well in their switching defense. He also gives them a small-ball center option when J Hayes and Co. are not playing well.
That small ball offensive option is particularly important to LAL's offense when teams cut off the easy rim rolls for J Hayes and/or are slowing down Luka and need to open up more space for him. Both things that top defensive teams like Boston are capable of doing.
Hachimura is like the ... release valve for their offense.
And a key component of their defense.