Mewtwo eats my CTM
Reroll my only Mewtwo from Phychic to HB. I would save my only CTM now and do it again till I get another one. RNG sucks.
Answers
They likely did it the way they've done it in an "attempt" to keep people from stockpiling them and keep them coming to raids to get more. Attempt is in quotes because I have about 30 of each and I'm sure others do as well. I also haven't been doing T5 raids nearly as heavily as I used to because the Regis just aren't worth the fuss in the current meta.
Legendaries aren't a big issue, I only power up one of each so the TM expenditure is pretty minimal.
What creates the potentially massive demand are teams of 6 of Mamoswine, Rhyperior, Togekiss, Honchkrow, Weavile, Magmortar, Electivire, Tangrowth, Roserade etc. There are a lot of mons with meta potential in gen 4 and only 1/3rd are going to evolve with the correct charge move. For the 2/3rds I need to reserve 4-5 CTM per mon because sometimes (I'd like to say often) the RNG is that bad.