Plaid does have real integrations with some institutions, using OAuth and the works. The list is relatively miniscule compared to the vast majority of institutions that still consider customer data their asset and not their customers'.
On the other hand, Plaid’s behaviour means that your data is not yours either, but is up for grabs by a 3rd party for which you may not have given consent to. Plaid is no Robin Hood (the story not the app) here.
Plaid is equivalent to a carrier, right? They merely provide the data to their client (whatever service/app you're signing into) and it's up to that client to decide how to use it.
