Can you give advice/commmands in Spanish with the conditional form of deber/tener que?

Question

Can you give advice/commands in Spanish with the conditional form of deber/tener que?

In this lesson I see:

Si te gustan esos pendientes, deberías comprarlos.

If you like those earrings, you should buy them.

Si ellos son los responsables, deberían pagar.

If they are responsible, they should pay.

These are advice/commands.

There is also the other lesson "Si [if] followed by present indicative + main clause [command/request/advise]".

What is the point then of this lesson?

Answer

By reviewing the different lessons you can see there are a number of ways to give orders and advice:

You can use the imperative - Si te gustan esos pendientes, cómpralos

Or use deber in the Condicional - , Si te gustan esos pendientes deberías comprarlos

Or you can use tener que in the Condicional - Si te gustan esos pendientes tendrías que comprarlos.