Where was it discussed? It's doesn't say that in the rules. In fact, the rules list an EXAMPLE of using a Veteran Trainer:
The equipment which you buy will only be good for that season. If I buy "Wimpy Weight Set" in Season 1, it will no longer be owned by me in season 2.
Training camp will be five days, and each player may use one equipment set for that day. Players may use the same equipment for multiple days.
To post your player's training, put all five days in the same thread at the same time, with the attributes that are being added. For example: Day 1: Wimpy Weight Set +1 Strength Day 2: Veteran Trainer +5 Tackling Do the same for the rest of the days.
If a player does not post their workout session, the GM may choose it for them. If the player then shows up, they may choose to change whatever they want, or leave the training how it is.
Everyone is responsible for updating their own player.
Training camp will last for 5 actual days, to accommodate for those who may not make it online certain days.
I asked you this EXACT question here:
So how do player lessons and trainers work for team training camp?
And you responded:
The owner can still buy them, it's all the same thing.
I REALLY don't see how you can change this rule now.