You are making the assumption that all GA pilots do their training part-time. This is a false assumption.
Thanks for the heads-up, I see where you're coming from. My current flying instructor did his training full-time as well, so I don't doubt what you have said.
The main point I've been saying is that a cadet who took 100 weeks to get from their TIF to the RHS of an A320 would be equally competent as a Direct Entry guy who flew in GA for 7 years, then went into the RHS. As you would expect, even though they are both equally competent at their job as an F/O, the profile of a cadet and a GA veteran would be vastly different.