Dick, Dick, Dick! The tower can do procedural control quite satisfactorily, which includes runway separation. An approach controller can't do that. When the tower's closed, approach just goes to MEL (and we have the poxy system where the crew are conversing on two separate frequencies at the same time...)
Procedural control surely can't be as safe as a servailence based service
Safe enough! On the one hand, you were quite happy to have no-radio VFRs mixing it with A380s at major airports, and RPT jets at regional airports, and on the other you're implying that procedural is so unsafe we've got to have radar everywhere? It's so illogical it doesn't make sense!
Or are our professional pilots perfect?
Err, no, that's why we have EGPWS. It's the third time I've mentioned it and you refuse to even knowledge it. You know that EGPWS has largely shot down your "radar prevents CFIT" argument, but aren't prepared to admit that technology has advanced from 30 years ago and now saves money as well as keeping airline passengers safe.