Yes, If the game is born in some ntr sentiment, It is alright. But, as far as I seen, most of ntr games are just planned "ntr" originally but later planned a non-ntr route too, just to bag patreon money from non-ntr fans. But, as the dev original's plan was canonically "ntr", that path gets high content, interesting with so much action, where as love/non-ntr route looks lame & boring. Because he is not good at that writing non-ntr content. It's not his area of expertise.
Some other games are experimented in reverse mode. They don't contain ntr content upto some chapters. But, suddenly devs will implement so called "optional ntr" scenes, where there is no actual need to include them. They did that because of requests from ntr fans. For example, In one game, MC enjoying girls with non-ntr style, players thought it's going to be a fun ride. All fans are happy. No complaints. But suddenly dev gave us a shock to include ntr scenes with adding new content to the on going story.
Result: Many non-ntr fans stopped supporting him & walked out of the game.
That's why, devs should be clear about things from starting itself. If they want to make it include NTR, they should say from first itself. Some games did that. Those games don't have much problems. Like Long Story Short, Tyrant etc..