wow youare coming off quite hastily and a little jerkishly. Just because you and I may have different ways of running our business, does not mean you need to be rude about it. I read the OP's post quite well thank you.
This is not an issue of the amount of work, but rather the stress and the logistics, planning, experience, preparation and difficulty involved.
If a family comes to a wedding and wants you to pull aside from the bride and groom and spend 25 minutes just taking photos of them for a christmas card, do you do it? Id snap a couple photos to be cordial, but not 25 min worth - they are not going to piggyback like that. I mean after all they could simply say I already traveled there, I already have insurance, I already have my cameras set up, its only 25 minutes, I already have lights set up at the formals, etc.... It's a silly argument.
The more work I do, the more liability and chance there is for equipment to get damaged, get stolen, etc. I have less leeway with 2 wedding parties ( EVEN if they are small ), I would in fact if my gear got stolen be much more liable because there would be TWO weddings to deal with, not just one, and the insurance argument is silly - Insurance is a fee per wedding, not discounted if there are two weddings together. A business is NOT about breaking even, nor is it about taking advantage of clients. It is about preparing for rainy days, making a living, hopefully growing and serving your customers. This is not to say You are wrong or I am right, just that we have differing opinions on the subject at hand. To try and belittle someone claiming they dont have a conscience because they run their business different than you makes you come off as a complete A-hole. ridiculous.
You are obviously very skilled from your portfolio and do things well for yourself, so that is awesome - kudos to you. My business also does well, but may be a slightly different model than yours. That doesnt make me immoral, without conscience, greedy or a scum bag, or "raping" my clients.
I come on fm to discuss and share points of view from other professionals. Not to act like a know it all or to try and let my ego get in the way of what could be a civilized conversation. Please don't have a conversation with me unless you can do it in a grown up manner. FM is not the place to try and start or cause drama. please.