Why would anybody want a tuna fish sub in the first place with all the other deli cuts available

?
Who the fuk goes to a sandwich shop to order a lowly mediocre tuna sub? I don't understand ppl who order tuba subs out of everything else on the menu.
Whenever I go to any sub/sandwich shop, tuna is the last thing on my mind, and matter of fact the shyt doesn't even come to mind when there are much better options like turkey, roast beef, corned beef, pastrami, rotisserie chicken breast, etc and that's without even mentioning the hot sandwich options.