Why are pre-order rewards not retroactive?

I realised that years ago, that's why I never ever ever pre-order now.

There really is no point in pre-ordering games digitally, its not like Microsoft will run out of copies, plus now that we can "pre-download" any game without even paying for it, means theirs even less of a reason.

And as for the "Pre-order bonus content" that some games offer, usually its just rubbish stuff that doesn't really change the game in any way.

Only if the promotion was going on when you pre-ordered the game. It won't be retroactive.

The system does not reward retroactively, that is how it is set up as all the purchases need to be tracked through the program (because not every purchase qualifies, and some purchases require multiple purchases to receive the reward such as pre-order 3
games for 15,000).

A staff member will review your account and reply to you here within 1-2 business days.

So are you telling me a staff member will go through my account and apply retroactive rewards or a staff member will come by to tell me I have no options?

It is the same as going to the store and buying something, then it going on-sale at a later date. Your best bet is to either participate in the pre-order events (digital or physical disc if in the US) or space out purchases to see if they go up for reward.
Otherwise, there is nothing the staff can do as they do not control the promotions and cannot retroactively reward purchases.

In order to get the credit for the consoles, you also would have needed to purchase them DURING the promotion period in order to receive the rewards points. Reward points for past purchases are not retroactive.