Sounds silly, not gonna lie.
Usually, promises taken serious and sentences like "you broke your promise" and "I believed you" being used in quite different circumstances - between people that knows each other and have some emotional bond. Like: "Son, you did promise me that you will clean your room!" or "Romeo, why did you broke your promise to always love me?" - "Believe me, Juliet, I still love you and will be until my last breath".
When some artist, for example a musician, making a statement that he will never make an album in some certain music genre, but then still makes it, starting a drama like "we believed you, but you broke your promise" looks kinda out of place. People changing, they are also don't own you anything, it's not like you really have their words. It's only on you if you took such promises deep into your heart, from a person you don't have any real relation to.
Also never saw a drama like "devs, but you did promise that you will release Witcher 3/GTA 5 in october, but you did broke your promise! So, you ruined your reputations and no one ever will believe you again!". Lol. Well, maybe some people doing it, but sane majority just moving on.
And Kalyha's reputation is based on his steady development pace and the quality bar that stays high and never drops. Not on his specific view on range of content and how he changes it or not, such things is just matter of individual taste and have nothing to do with reputation. Moreover, his statement "no ntr with 4 main girls" still true.