Looking at common European systems, reducing the number of buses in city centres by diverting those from the outer fringes of the city to the nearest rapid transit rail system for a quality connection and a faster end to end journey doesn't reduce the attractiveness of public transport, it increases it.
IT does both improve and worsen the attractiveness of public transport depending on who you are and what your needs are. Many people don't like changing between buses or modes of transport and so they would be put off by the forced change. For those travelling regularly multiple modes and don't have a link to the other modes, it would improve the situation here. It depends how transport savvy you are and what journeys you want to make. Buses and trains can run side by side and both make money. As Carlberry says.
Perhaps doing both and seeing which one people prefer would be a revolutionary idea!
Also the post I was replying to stated 'reduced frequency on main routes to allow for improvements in areas which are currently underserved', that just makes the main routes less attractive.
So just so I understand properly - you're saying most users of the 192 aren't going to Manchester city centre?
Yet there doesn't seem to be a market for a bus service of that frequency along the full length of any Merseyrail line (though there are some sections with frequent bus services, but nothing like every 3 minutes) - what's the tipping point I wonder, 4tph?
You may wish to take a look at buses adjacent to most of the Merseyrail lines.
Eport - Birkenhead and Liverpool: Stagecoach 1/X1 every 10-20 mins.
Eastham Rake & Bromborough to Birkenhead - Stagecoach 41/42 every 10-12 minutes.
Bebbington, Rock Ferry and Green Lane to Birkenhead - Arriva 410 every 20-30 mins (plus the Stagecoach 38 at Bebington or 41/42 regularly from Rock Ferry and Green Lane)
West Kirkby line duplicated mainly by Stagecoach 38 and Arriva 407 to Birkenhead.
Hunts Cross has the 82 route groupings every 4-5 minutes very close by.
Kirkby line duplicated by Stagecoach 20/21 every 6 minutes.
Ormskirk Line from Old Roan south covered mostly every 10 minutes by the 300, 310 and 345.
Southport line south of Crosby covered by the 53 service every 7-8 minutes.
This is just services running very close to the railway. There are even more which people use which call at a few random train stations (Arriva 437 every 7 minutes from Liverpool, Birkenhead and then through to West Kirkby. Arriva 47 and Stagecoach X2 running 5 buses per hour from Southport to Liverpool). I think you might want to make a trip to Liverpool as well and see the amount of people who go through the tunnel by bus and then change buses using bus stops closer to their place of work and then changing within the bus station onto some of the many other bus routes. Your logic does no body any favours.
If the good people of Greater Manchester are really so unhappy with bus franchising above all else they can vote in an anti-franchising candidate in May, if one exists.
The issue is in some areas, unless there becomes a huge rebellion like seen in the North East, there are some seats in the North West where Labour could put forward a zoo monkey with no policies and still win because people are just 'anti conservative' and the other parties don't normally put up much opposition. Even when someone has done extremely badly, people don't vote them out because they believe in the parties policies, not always the individuals and so even if an opposition promised £300 per week for all residents as a universal basic income, they still probably wouldn't win the vote purely because people have loyalties and agree more strongly with Labours policies overall rather than the specific franchising policy.