Corn snake vs BP enclosure contents

[Bogertophis]

In my experience ball pythons will climb if provided the opportunity. This may decline as they get bigger bodied and older but as youngsters mine seem to enjoy climbing around when they come out in the evenings

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Yes, climbing ability in BPs declines quite a bit as they grow, they just aren't built for climbing the way corn snakes are...but you're right that there's no reason they can't
enjoy it while it lasts. I just wouldn't give them the same height options you can give a corn snake, since falls may not be innocuous...they can cause internal injuries (broken bones, bleeding & abscesses).