Look, there's definitely some sense in this, but it's important to understand that MSB isn't a "magic button," but simply a foundation from which you can get started. In Canada, MSB is actually capable of handling transfers, crypto, and currency exchange—it's the official format for such things. When I was researching the topic myself, I came across
Gofaizen & Sherle, which clearly explains the possibilities it offers. A colleague of mine was launching a payment service, and he went with an existing MSB to avoid waiting for registration. He said it sped up the launch, but then he still had to work closely with AML/KYC and find banks willing to cooperate. So, it's a good foundation, but not a guarantee of an easy life.