There-in lies the problem, except for a very small portion of ships potentially. A T1 alternative module is next to free, while a T2 is 1-2m+. You first have to get over the hurdle of if the upgrade to T2 is worth that fitting constraint (the vast majority of time it’s not). At that point in the remaining cases you can spend arguably not too much more to jump to a faction or deadspace. Add into that the abyss module market and you have even less case for T2.
Of course, if you are trying to fit 100 ships for a doctrine this scenario changes, but for all other purposes it holds true.