You're going to struggle to give up anything your gut bacteria is tuned to being normal, so there is an effort associated with changing your diet - but once you have been on a new diet for a few weeks, assuming it is balanced enough to be sustainable, it becomes easy.
You also have to want to do it; it's far easier to eat whatever is convenient than to put effort into finding ingredients and cooking them. The problem is that what is convenient is _not_ good for you long term, at least in the US (and at least several other western countries). A good diet is fundamental to good health (both physical and mental) - you'd think this would be axiomatic, but there are plenty of people who don't care enough for whatever reason.
You also have to want to do it; it's far easier to eat whatever is convenient than to put effort into finding ingredients and cooking them. The problem is that what is convenient is _not_ good for you long term, at least in the US (and at least several other western countries). A good diet is fundamental to good health (both physical and mental) - you'd think this would be axiomatic, but there are plenty of people who don't care enough for whatever reason.