Actually, I do think that Nayko93 has a point. Although not 99% players do prefer sexually explicit material/erotic material, a good portion of them do like it! Look at this survey conducted by TailorTale's creator: https://tailortales.wordpress.com/2018/12/03/an-in-depth-look-at-what-otome-play...
One of the surveyed questions was if players would like otome games with adult content. A good 39% of the survey sample want explicit sex, 34% with "softer" adult themes, while 20% have no preference. With that being said, more players do prefer explicit sex/adult content than those who don't. Although the sample size can be argued that it's low, with 778 respondents, it does tell you that more otome players are starting to prefer or like explicit material.
In my opinion, the thing about "given the number of otome games that don't have any erotic elements at all." is because most western otome game makers are usually young females that don't feel comfortable writing or drawing any adult content. But again, older players and otome game makers prefer adult content (See the survey for respondents age 25+ preferring adult content or how older otome game makers, like Michaela Laws, from Seduce Me, make games with adult content)
However, this is your game and work, so it's totally okay if you don't like or want to include more explicit content! It's understandable if explicit content isn't your thing! But players like Nayko93 and I are one type of demographic that do like explicit content and try to find/play any R18 otomes we can get, since they're so rare, hence the (slight) disappointment when it's not as explicit as we would like :P Anyways, your otome was well written and fun to play through! I hope you do make more otome games in the future :)