Especially in Mia's story the choice makes a lot of sense. Mia obviously, despite all those troubles, loves her family and if MC fails to bring Helen and Harold together (driving Harold out of the house) and instead starts fucking her mom, of course she'd be angry and wouldn't start a relationship. On the contrary, if MC fixes her family she'll be happy and thankful. That's why the choice was/is so good, because it actually means something.
Unfortunately, in this version, the choice between Helen and Mia is pointless.
Since none of them knows at what stage is MC's knowledge of the latter, no one had a reason to ask MC to choose.
This would indicate that this choice was made by the MC on its own initiative.
And something like that is unbelievable when the same MC fucks a dozen other women.
The facts are that MC is presented not as an alpha male who walks and combines how to get to the panties of every woman he encounters, nor is he presented as an idealist who is looking for the one woman who will be his love, but as nice, calm and helpful boy from the neighborhood, who will help anyone who needs help thanks to which the taboos of graceful women spread legs in front of him, which he eagerly uses.
In this situation, the choice presented in this way as now is completely senseless and unbelievable.
I personally choose Mia just because Helen has undergone something like brainwashing and manipulated into a sexual relationship with MC under the guise of a religious rite. If, instead of having sex in a church with a rope tied to Helen, she was having sex in her own home with her conscious choice of sexual relations with MC, no doubt my choice would be on Helen every time.