Monocock
I think the problem you describe is one not knowing the "mission profile" i.e. not knowing what one wants to do flying-wise.
If one knows what one wants to do, choosing a suitable plane isn't hard.
The trouble is that most new PPLs don't know what they want to do. From what I have seen, the majority do a PPL purely as a personal challenge, some want to be airline pilots, a few want to do aeros, and almost none do it for going places (touring).
Yet it is only the last two groups that can have a good enough idea to pick an aircraft type early.
For someone who does have an idea, getting into a group, or buying a plane, and doing this ASAP after getting their PPL, is probably the best possible thing they can do to advance their flying, not least because the direct hourly cost is far lower than renting and this promotes currency.