LOL. We, the oppressed masses, crave *less* hot lesbo action in games, which is only in there because fake woke wussies and the snowflakes bullying them. Well, I for one am glad there's still people willing to stand up and put themselves on the line for a noble cause.
What about genuine woke wussies? Do their ideas matter?
1. The MC was not only on the trip because he has a license but because he is the caretaker or father depending on your preference and all three share the same issue. Grief over the loss of a loved family member. All three take this trip to finally accept the loss and move on with their life. The entire Trip is for this exact purpose. It may have started for a different reason but as the story moves forward this is the goal all three try to achieve as the story unfolds.
I also see this trip as continuing with the "Lot's Daughters" symbolism introduced early on. The three have (for a time) left their homes and are now wandering in the wilderness. To all extents and purposes, they are the only ones in the world at this moment; there is no contact with the rest of the world.
Once this is achieved and everyone is open for that approach it is Denise that starts influencing both the MC and Macy to the idea of a more romantic and lust driven relationship between the three of them. This is the current point we are at.
2. The Lesbian scenes are maybe not to your taste but serve the purpose of Denise overcoming her shyness and having a better relationship with her always grumpy and many times aggressive sister. Macy on the other hand learns to be vulnerable and letting someone close, being intimate and share feelings once again. Under all that hate is a very fragile and hurt little girl that yells for help.
The lesbian scenes are not there for shits and giggles but actually serve a emotional bonding process when you get intimate with someone. It is no coincidence that both Denise and Macy once their share certain moments together become more and more open with stuff they want, stuff they talk about between each other and feelings they realize.
This also is a key element for Denise to push Macy towards a relationship that involves the MC while also destroying the emotional wall Macy has build in order for her to handle her grief.
Yes. In many ways, Denise is approaching this from a therapeutic standpoint. She wants her family to let go of their pain, their separation and become more cohesive, and takes much of her inspiration from the Lot's Daughters paintings. She cares not for the society created labels of straight, lesbian, or bisexual. She only knows that she wants her family to bond. Being younger, she has not integrated many of society's messages. This is where she has an advantage over Macy and functions as a teacher/guide for the elder.
Both Denise and Macy grow and bond in those Scenes because they share their feelings, thoughts and insecurities. This also again serves the purpose to move the story foward for a romantic relationship between the three.
Yes, the physical intimacy, the sex, is there to support the story, not the other way around (as with most modern porn)
Regarding your analogy with the Matrix Trilogy, some might say that the story falls apart anyway.
The scene with the passed out MC was only for the girls benefits , I don't think it was anything more than that. He got nothing from that, no involment and enjoyment because he was passed out.
Once again, this is an allusion to the situation of Lot with his daughters. It makes perfect literary sense to me.