Well yeah, isekai main audience can't find a relationship relatable when both parties are on the same level and able to connect for good reasons.
Hence why there are always slaves, contracts, rescued damsels or OP MCs that attract groupies.
nah. that really just depends if the author wants to turn his work from brief ecchi scenes to smutty. I bet the closest he will get to anyone would be a kiss with a girl near the end of series.