Fallen leaves

It is Autumn here in the Southern hemisphere and I have been letting leaves from our deciduous trees (oak and beech) fall (or blow) onto our garden beds. I’m trying to follow the wisdom to leave the leaves for our critters and let the leaves nourish the soil.

However I read some advice stating that too thick of a layer can be problematic and prevent moisture reaching the soil and restrict air flow.

Is this really something to worry about? Should I be managing the depth of the leaves or just let nature do its thing as it always has?

Cheers