Most guests haven't done it time and time again like many of the people on this board. If you're skipping Mermaid, LMA, Animation Academy, Beauty and the Beast, Disney Junior, Indiana Jones, and Frozen, sure you can be in an out if the park by lunch time. But if those shows are new to you and you've only seen them once in your lifetime, your trip to DHS is going to be much more than RnRC, Tower, Star Tours, Toy Story, and done. It's not that DHS has too little, it's that you're skipping over half of it.