Honestly, because I really love game design topics and have a lot of curiosity about how choices are both used by developers and perceived by players, I've spent a lot (far too much) time exploring the idea of "right choices" in VNs. It's not a subject anyone in their right mind should get me talking about. People on the Discord server know....( •̀ ω •́ )✧
(Though I guess this is me *any time* I start trying to explain why I make certain decisions. Rofl)
But honestly I get where you're coming from. Kisses and other relationship milestones are often very, very elevated in romance stories. Sometimes I make a deliberate choice to treat them casually specifically to break away from the moulds that treat them like the holy grail. But I think in both GS and WSC the main issue is that the bigger milestone in the relationship is the love scene so it feels strange to treat the first kiss with the same gravitas. There still has to be room to build up to that bigger romantic moment, which means the first kiss gets treated a little more casually.
The structure of WSC in particular needed a "lock-in" moment. It needed to happen somewhat early but not too early which meant it needed to be somewhat significant but also not too significant but also not too casual. So, more significant than holding hands but less significant than a love confession. So I landed on this somewhat casual kiss and spark of interest.
I'm stopping myself here and deleting the three paragraphs of rambling about point systems because I can tell I'm going into text-wall mode. 🤣