Again it’s just a wish list. Manchester’s priority is getting a connection to HS2 by hook or by crook. This scheme is just a way to get it through the back door.
Notice how the Warrington to Liverpool section is listed as phase 2 of the project, despite being the easiest and cheapest section.
But building the Manchester Airport to Manchester connection as part of this scheme also helps trans-Pennine services (not just TPE operated) by speeding up and segregating journeys west of Manchester.
The Warrington to Liverpool section may be seen as the easiest because of the extant railway infrastructure, but there's a lot of redevelopment that needs to be done around Warrington Bank Quay to make it work (possible relocation of the chemical works, serious upgrades to massive improve line speeds etc.).
The reasons you stated are why I hardly ever fly from Manchester. I pretty much always fly from Liverpool.
Makes sense
The whole thread is full of "ifs". Sunak cancelled HS2 north of Birmingham because it was not value for money in the current economic climate. This proposal for a completely new line via a roundabout route has even less potential benefit but is also likely to cost vast sums of money that the UK does not have.
However, it is reasonable to spend a little money to make modest improvements to the infrastructure and passenger services on the 2 existing direct rail lines from Liverpool to Manchester.
Despite its modest network of international scheduled routes, Manchester Airport remains primarily an airport for outgoing holiday flights to the Mediterranean and other tourist destinations. Its further development is unlikely to bring major economic benefits, so the proposed devious route of this new line to serve a station near (but not at) it, is unwarranted.
I respect your right to hold that opinion, but I completely disagree with it.
1) The Styal Line is already overcrowded from Manchester Airport into central Manchester, so a new line would not just provide a HS2 corridor into central Manchester, but an express link for NPR and to relieve local lines to make space for extra profitable south Manchester commuter services. There is also a lot of potential for further rail passenger growth into central Manchester with a high speed tunnel journey time attracting even more modal shift from road transport.
2.) The UK does have the money - it is obtainable by increased taxation in any case, and the projected economic gain means that it will help decrease spending in other areas (including welfare payments to support deprived areas) by providing increased access to highly-paid jobs.
3.) Despite my personal dislike of some of the facilities and poor experiences there, Manchester Airport is growing to provide a sizeable and growing range of long haul connections, which involve passengers reaching it from all over the UK, especially northern England and Scotland. This is turn does increase the demand and pressure for improved intercity travel links to the airport, which NPR/the new L&M is a part of.