Arabella understood that talented people like Ivan had to go at their own pace for them to shine their brightest.
This was the same reason Ferdinand simply provided everything Alwin needed and was allowed to learn and master what he wanted.
People like them had to be allowed to play and explore as they wish without getting shackled by this and that.
Alwin excelled in everything as well and actually did better than expected even in archery and swordsmanship. He simply lacked the interest in it since he preferred magic.
Ferdinand still made Alwin learn it though since he also needed it.
There were also times Ferdinand slacked off on those because he thought he was already strong without them anyway.
But it was what led him to getting caught by his enemies or even humans when he was younger.
There were times it cost him his horns and his wings before.