Are all orchids as easy as any houseplant? Of course not, but if you can grow a Philodendron you can grow a Maudiae-type Paph. If you can grow an African violet you should be able to succeed with a typical Oncidium intergeneric. If you can grow a Hoya you can grow many Catts. In each case under exactly the same conditions, and much easier than many houseplants I could name.