By your way of thinking, here’s how the conversation should’ve gone:
Ananias: And now, why tarriest thou? Arise and be baptized and wash away your sins.
Saul: My sins were all washed away on the road here! What are you, a Campbellite?
Ananias: Oops, my bad.
Saul: Sheesh, all I wanted was a simple gospel.
And yet, if YOU really followed what Paul did you would be taking vows, shaving heads offering Temple sacrifices.
In fact, JAMES, whom so many of you seem to grasp like a straw talked PAUL into taking some men to the Temple and “be at charges with them” (Pay for their animal sacrifices)
ACTS 21:
18 And the day following Paul went in with us unto JAMES; and all the elders were present.
Acts 21:24
Them take, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and keepest the law.
Paul got a free trip to ROME out of that escapade!