If I was a Clown fish, I think I would be happier if I had an anemone....haha
Its true that clowns dont need an anemone to live long term and many keep them without one...They are pretty hardy and most are easy to keep in a proper system. If you want a Clown fish but cant keep an anemone, then dont let that stop you.
BUT, if you ever seen the relationship that they have with one then its something you want to have. Beautifull. Thats why I have them together....
Also as said, and as you seem to somewhat understand, much is needed to know about keeping an anemone and do please research them befor trying one.