If I owned a pizzeria, I would prefer not to offer delivery (because I've been a driver and I know it's a crappy job), but I would deliver if I had to deliver. For example, if I opened a pizzeria smaller than 1,500 square feet, I'd almost certainly have to deliver because there wouldn't be any room for a dining room, and carryout alone would certainly not pay the bills. It's not about doing what I want to do; it's about paying the bills.
Most pizzeria owners don't seem to understand this, but you don't always get to do everything how you want to do it. You have to base your business model on supply and demand. You need to supply what your market demands. If I think my pizza is the best thing ever but most of my customers tell me they'll only come back if I put less garlic or basil in the sauce, then I'd start putting less garlic or basil in the sauce. Because it's not about what I want; it's about what my prospective and existing customers want.
The customer is always right. If they want you to deliver, but you don't deliver, they'll order from someone else and you'll go out of business.