It's difficult in that you can't go out to a normal dinner without being really careful about what you eat. For instance, if you go to a normal restaurant (not one catering to vegans) and order a salad and ask for no cheese, but they bring you a salad that has cheese, or has croutons that are obviously all buttered up, or something else. Now you have to send it back and wait for them to make you a new one. For a lot of people that's fine. They're happy to get exactly what they want and to wait for it. For me it's not worth the effort, concern, stress or whatever. I just eat the salad.
So yeah, if you aren't bothered by interrogating every waiter at every restaurant you ever go to and returning food regularly, sure...it's not hard to be vegan. I'd rather live mostly vegan and not sweat the small stuff.
This is only true if you go to restaurants that serve dairy-heavy cuisines.
Go to any normal Chinese or Vietnamese or Thai restaurants and it's pretty hard to not find vegan foods on the menu. Mock duck, Buddha's delight, wood ear salad, stir fried soybeans and fermented cabbage, red cooked tofu and mushroom, braised seitan in soy sauce, eggplant in black bean sauce, bok choy in garlic sauce, etc etc -- these are all just normal dishes that are also vegan. The restaurant wouldn't even have to make any special accommodations for you.
So yeah, if you aren't bothered by interrogating every waiter at every restaurant you ever go to and returning food regularly, sure...it's not hard to be vegan. I'd rather live mostly vegan and not sweat the small stuff.