I feel like part of the 30% tax that app stores extract is based on how easy it is for users to simply buy what they want with money that's probably already in

I feel like part of the 30% tax that app stores extract is based on how easy it is for users to simply buy what they want with money that's probably already in their account. Most of the money that I've spent on apple and google apps comes from gift cards. If I had fortnite on my android phone, and considered making an impulse buy, and was required to put in credit card info, I might reconsider the purchase.