Yeah, that is something i hate about japanesse LN, how they treat the ecchi, luckily in the last few years that ha sbeen changing, now we get REAL harems, protagonists with funtional dicks and/or plots where the status quo isn't god.
I remember when Rakudai didn't streech the drama and declared the main couple in the first volume for example (and fuck Sol press licensing and not releasing volumes)