We must also consider the safety factors

2. For example, we have Śīrṣāsana and Padmāsana.
Because of being able to do these Āsana a
person wants to do Padmāsana in Śīrṣāsana,
exploring an Āsana known as Viparīta Padmāsana.
However one has to know the factors involved.
One cannot assume that because two things
are possible, a third will follow automatically.

Āsana Mudrā & Prāṇāyāma
– Collected Viniyoga of Practice Planning Principles

Āsana Mudrā & Prāṇāyāma
– Collected Practice Planning and Practice Theory Questions