I disagree. If an indoor works for you and you can receive all the stations that you are interested in without reception problems then there is no easier way to get OTA HD and anything more is just added complexity. Maybe you and I are technophiles so we don't mind dealing with gain, insertion loss, amplification, etc., but most people have better things to do with their time than become RF experts.
In cases where an indoor antenna might work, an outdoor antenna will work without a no preamp and line losses don't matter. I still content that the proper antenna mounted outdoors is less fuss that the tweaks and experiments needed with indoor antennas.