Saving Resource building

So, I know people has often requested something like Bank or whatever the name 'building that save your resource from being raided'. The usual response range from 'blind I like it' post to "raiding is the point of the game" and "it gonna make the loot worse, so it won't happens" posts.

so why do I create this idea, it's because right now we can upgrade walls with both elixir and gold, which as some people already thinks, will make loot worse and make it way harder to upgrade things (barracks/camp/etc). So why not create a building where you can save your loot from being raided to help casual and not-so-hardcore people to upgrade the building?

While the general idea of a building that can save your resource will make loot worse than usual, I believe there's ways to help casual/people who isn't lucky enough to get enough resource to upgrade building, while not making the loot really bad or making the building too OP and make people's resources can't be raidied

So, my idea is to limit these saving resource building with your builder. You can assign your builder to this building, and your saving limit will increase for 1 mil for every builder that you assign there. (limit for 0 builder assign can be 0 or probably something that supercell decides to be ideal). So people at TH 9/10 that can't make enough income to work all builder can use those idle builders for something: try saving more loot with those idle builders with this resource saving building.

I understand that raiding is an important aspect to this game, but some people probably need to admit that the loot right now isn't as good as it was a year ago, and thus making it significantly harder to find loot when raiding

thanks for those who read this. any advice is welcomed