"Experts" on "hoarding" often comment on "hoarders" *being* indecisive, having difficulty making decisions - in a static, matter of fact way.
As if it's a unchangeable characteristic - like eye color or height - and a symptom of the hypothetical "hoarding disorder".
In reality, it's a skill that can be learned and improved, from knowledge, by example and by practice.
If decisiveness were truly a fixed trait, then training, tools, reduced pressure, and practice would not reliably improve it — yet they do, consistently.
A person may well start out with lacking decision making skills - simply because nobody taught them, no parent walked them through their decision making processes, or even parents instilling downright bad processes - perfectionism, making any mistake or bad outcome a personal failing.
While this may end up being a deeply rooted habit, it can in most cases be corrected, improved.
The experts on "hoarding" don't say it outright, but the way they position their characterization of "hoarders" - stating it as a constant characteristic of a person - they certainly imply it - quoting from Stuff -
> The chronic savers we studied were highly perfectionistic and indecisive, having trouble processing information quickly enough to feel comfortable making decisions
If taken at face value - and we should be cautious about that, because there may be a big asterisk of "this isn't what it seems" hiding somewhere - that fits to a T the scenario where they weren't taught a more effective decision making process from parents and by example, and in fact were taught the bad decision making process, perhaps motivated by the very same parents, or the absence of their participation.
Furthermore, once we strip away all such "characteristics" of "hoarders" which are really learnable - what is going to be left of the "mental illness" ?
Unusual hobbies and preferences, creativity, tinkering, choices to keep and do unconventional things, an occasional Runaway Mental Process, combined with stress, overload, insufficient resources..