Wayne,
I think the "too much choice" thing is again an ex&le of 'the wrong aproach'.
We should know first what we want to do. Then get and use the appropriate tool.
And unless we have several tools that do the same, there never is "too much choice". One, and one alone, will be the only choice possible.
And even when there is a (redundant) degree of redundancy, any of the tools that 'does the job' will be a good choice of tool to do the job.
I don't see what would be difficult, "limiting" or even "detrimental" here.
So when opening our well stocked bags we (should) know what we want to take out. I can't imagine being bewildered or stunned by the amount, or diversity, of what's in there, such that i would suddenly forget what it was i was doing.
The tools have absolutey no vote in which one i want/need to use. That would be something, wouldn't it...?
But i do see your point about perceived and actual needs. So yes, it is important to be "fully cognizant of the qualities of the tools/materials that" you "already have at" your "disposal".
The word "already" however is a bit 'strange'. The content of our toolkit should have grown out of our needs, and it should 'already' be well known to us what a particular bit allows us to do, before we even get it.
After all, that (what it allows us to do) is the very reason we got it, right?
So (returning to the perceived and actual needs bit) the actual content of our toolkit is a reflection of our actual needs.
Things are in there because we need them to do specific things.
Things are not in there, because we do not need them (yet) (Or because we cannot afford them, yet. There's the catch...
)
Any discrepency between actual and perceived needs would indicate a purchase was made (or not) for the wrong reasons.
And that's why the many "what kit should i get"/"what lens to buy next" questions are both so very common and impossible to answer.
What someone should have is what that someone needs to have. How would i, or anybody else, know that? Only the person asking can provide the correct answer.
Your "square pegs just because one happens to prefer them" bit is interesting. You cannot help but ask why one prefers square pegs anyway.
Maybe those holes aren't that round after all? Maybe the actual needs are just perceived to be the actual ones, and actually are the perceived ones, and the perceived ones are only perceived to be the perceived ones, though actually being the actual ones?