Should you Do Cruise Line Excursions? Yes or No?

I look at the Pros and Cons of cruise line excursions, and look at the best reasons for booking and doing your port tours with the cruise line, and the reasons for not doing excursions with the cruise lines. Many travellers use cruise line tours as it is convenient and easy, and they like the guarantee that the ship will not depart until all of their tours are back, even if running late.