Why not automatically apply the coupons?

I will never understand why meijer refuses to allow automatic coupons. Why do we need to clip our own coupons when they are all stored under M perks, when we buy the product and we scan our mperks card the coupons should be automatically applied like Walgreens and every other store does it.

Mmmmmmmmhoo about Meijer - Delivery & Pickup