Do's and Don'ts So Others Won't

No it's syntax not style. Try it with an object variable.
For example:

Sub StopUsingParentheses()
    Dim rngTest As Range
    Dim x As Long, y As Long
    
    Set rngTest = Range("A1")
    ' oops!
    macro1 (rngTest)
    
    x = 4
    y = 5
    
    ' this won't even compile (so commented out)
    ' macro2 (x, y)
    
    ' and this just seems weird:
    macro2 (x), (y)
    
    ' but you can do:
    Call macro1(rngTest)
    Call macro2(x, y)
    
End Sub
Sub macro1(rng As Range)
    MsgBox rng.Address
End Sub
Sub macro2(var1, var2)
    MsgBox "Var 1 is: " & var1 & "; var2 is: " & var2
End Sub