FFF: I think you may be right. My point was that in order to comply with the restrictions on your basic PPL you might find the requirements of routes or levels on IFR flight make it impossible.
I assume we are talking about flight outside CAS here. If you take the parallel of a PPL with a night rating only (no IMC) then he is flying under IFR but must remain VMC, so it must be possible to fly IFR by day with a basic PPL provided you remain VMC at all times.