I feel like the only time it's acceptable are times where the person died part way through production keeping that last film as a memory of them or cases like what they were doing with mickey back in 2013 shorts

Wholly agree. I don’t think it is always well done (cf. the Rise of Skywalker) but it is not weird, ghoulish and inappropriate.

but they used sound bites of walts voice to capture og magic cause like in the mickey case it's paying homage to the og artist having put their whole self into it especially since from what I remember that scene was a remembrance of Disney's origins using even some remastered vid from old shorts