Actually J.R.R. Tolkien&#x27;s son, Christopher Tolkien, is the executor of his estate and was editor who released both of those works [1].  But, yes, he wants to preserve his legacy, and unlike the recent films, he thinks the published books (even recent) do just that.  
[1] <a href="http:&#x2F;&#x2F;www.worldcrunch.com&#x2F;culture-society&#x2F;my-father-039-s-quot-eviscerated-quot-work-son-of-hobbit-scribe-j.r.r.-tolkien-finally-speaks-out&#x2F;hobbit-silmarillion-lord-of-rings&#x2F;c3s10299&#x2F;#.Us2yxGRDulr" rel="nofollow">http:&#x2F;&#x2F;www.worldcrunch.com&#x2F;culture-society&#x2F;my-father-039-s-q...</a>