Thanks for reviving this thread, it has been an interesting read.
I'm all for easy access, for these reasons:
1) I consider all my kits as work in progress. Use and evaluate.
2) I want to be familiar with my kits and their content. This means I have to use them, I can't seal them and put them away. I could if I duplicated all the gear with training kits, but my kits are still evolving, and duplicating every adjustment simply won't happen.
3) I want to use my gear for minor inconveniences, not just emergencies.
4) At home, there is just too much things that needs to be done. It is much better for me to fix my gear out in the field, where I actually have the time to do so, than bring it home.