Gem Usage Confirmation

Hello people, yesterday I wanted to see how much gold/gems I would need to upgrade a bomb to level 5 and while checking, I mistakenly bought the require amount of gold to upgrade it which was 1 million gold which caused me 5 months of saving up gems to be a waste because it spent 500 gems($5 USD) to buy the required gold which is a complete rip-off. What I request be implemented into the system is that you would have to type 'confirm' or something to use your gems to upgrade something that is worth over 50 gems. However, you have an option to toggle this on/off in the options menu so that if you want to go on a gemming-spree, you wouldn't need to be able to type it every time.

this idea is currently ruled out by supercell, please read the stickies before posting.

Miscellaneous:
*Resetting or restarting a specific village
*Rate base feature
*Keep replays through maintenance – increase from 4 to 6 or at least since last login
*Add a setting to disable village animations to improve performance on older devices
*Add gem use confirmation on all functions
*Botany Research- Ups spawn rate of obstacles and/or increase in chance/# of gems when removing
*Additional leaderboards based on TH level
*Add ability to play background music while in game natively
*Add push notification for Hero ready (healed/able to attack)
*Log gem usage/gains in gamecenter (or ingame) so users can look to see where they went
*Add an unmute option for accidental muting – or have a list showing all muted to pick certain unmutes
*Add custom sound notifications for Clash push notifications
*Add mini-games, something to occupy time

Currently ruled out! I don't understand why it is ruled out!?