Okay, so why, from a thousand other places with plenty of vegan options, why would you go eat specifically at a place all about chicken?
Cause they have a certain dish that's really good and other places don't come close in either taste, quality or price? Or maybe you accompanied your friends or they recommended the place for this dish?
You do realize there is more to life than chicken, right (not to mention that fried stuff is actually not the healthiest food)? Aka there is more to this story than just incest with underage triplets.
I find Brooke an extremely interesting character with a well done 3D embodiment (she is hot); Chelsea is cute and nice too - hotter than Brooke -, easily coming in as 2nd best girl in game (most of the end result of their traditional upbringing - if not Brooke's upbringing by insane vicious parents - also really appeals to me), Jade's poor self-esteem and life of on the verge of being outsider also tugs at my heart (something similar for Vanessa) and I guess they would also appeal anyone wanting to dip their wick in crazy.
Considering that the author included all these other love interests with stories as strong or even stronger than the triplets to the point they would overpower the triplets' arcs (Brooke/Chelsea would end up becoming the girls' mother) he really should've created the possibility to completely avoid the triplet arcs, instead of have them active automatically and be unavoidable, especially since they fuck with other arcs.
You can only cancel Olivia story after a really long time and by hurting her and I haven't even found an option to do the same with Allie (with how MC is written in this arc he is either craven/coward/weakling or a huge Creep) and at least Madison is confrontational enough and there are enough options so that you're not being beaten and frog-marched by author into being a Creep (with capital C like with Allie).
And, yeah, considering how the Brooke arc goes (despite quickness of sex, there is strong emphasis on Brooke not making her choice easily and thinking long-term, not to mention the pregnancy issue where MC states that he wants kids with her and Brooke wanting him to cum in her despite not being on birth control) and Jade's future pregnancy I would say those arcs are seen by author as equal to triplets' (especially since you can at least cancel Liv's arc and avoid Maddy's and have relationships with the ADULT women in the game).