For some, kata bunkai is like a Rorschach test, looking at an ink blot and seeing whatever they want in it. Interpretations from another art isn't even necessary. Now it's great to explore kata for applications, and maybe even discover the original intent, but one can get too enamored in this and take it way too far.
Like a carefully crafted recipe for strawberry short cake and taking out the strawberries and adding chocolate and cherries. It might taste good but it no longer can be called a strawberry short cake, not what the master bakery chef intended. Over time, the original recipe may be lost forever. I have found that those who do such things do so as they don't know how to bake a good strawberry shortcake, or wish to carve out a niche for themselves as an innovative chef.
Since kata actually did have some hidden moves not recognized by the uninitiated and has suffered some drift over the past century, some adjustments may have to be made in the form to realize the intended bunkai. But these adjustments are minor, such as a pivot, a twist of the wrist, a shuffle, a three-inch change of angle, etc. Go much further than this and you are fundamentally changing the form.
Not only this, but flexible paths for variation to cope with the X factor in combat can be lost, in essence creating a cul de sac where there used to be an intersection. There are plenty of options in the forms as already constructed. No need to redesign them and invent new bunkai (other than as an intellectual exercise if you get bored with the kata).
This can be seen beginning in short form 3 which is basically a collection of grab releases and other attack counters. There is little hidden bunkai in Parker's system. It's remarkably similar to Okinawan karate, something I did not realize for a long time. Many of its moves and principles can be used in conjunction with my isshinryu due to this kinship. Combining techniques/principles from some other styles may not work out. Some ingredients just don't mix well together.