If they did manage to hit 125 mph and if the tunnels were built over long enough distances, couldn't these be a competitor to travelling by air for shorter trip

If they did manage to hit 125 mph and if the tunnels were built over long enough distances, couldn't these be a competitor to travelling by air for shorter trips i.e. 1-2 hour flight times? You can go a long way at 125 mph in the time that's not directly used in getting you to your destination i.e. travel to airport, security, etc. etc.