Of course you can't. Religion is just about answering the big questions in life. GK Chesterton talked about philosophy as thinking that is thought all the way through. It is a pain to do this but the alternative is to not think things through. With religion you can do that. You can refuse to think about the really big questions in life. It is cowardly and irrational but you can do it.
The trouble is those questions do force their way onto the stage at some point. Often you are not ready for them because it happens at the moment of great crisis. A loved one has just died. You have just seen your life's dream crash. Whatever it is. That is when you notice your world and life view is missing in action. That is precisely when you are most likely to get sucked into bad religion. You are emotionally needy and you are not going to be able to think straight. It is really not the best time to be making big life choices but that is often when they get made.
The good news is that most people who make religious commitments under such circumstances end up in a pretty good religion. Some end up in cults or radical groups but most are picked up by an aggressively-evangelizing protestant church. Theology won't be their strong suit but they likely get a lot of things right.
What happens next? Not a lot. They typically either stay where they are at and embrace the tradition that brought them to the faith or they stop going to church entirely. Very few of them do any serious reading and try and find which Christian church has doctrine that makes more sense than the others. Even if they are in a church that makes up a very small fraction of Christendom.
Suppose you are sick and look for a doctor. But the first doctor you run into is a Sioux Indian medicine man. Would it make sense to judge all medicine by this one medicine man and other medicine men he introduces you to? That would be nuts. You need to go to a mainstream doctor. Even if the medicine man tells you main steam doctors are no good. But this is what people do with Christianity. They judge Christianity based on one particular tradition. They either embrace that tradition or reject all of Christendom. Even when that tradition might be just a few decades old and amount to a trivial fraction of all Christians.
For someone to reject Christianity without seriously investigating Catholicism should be quite strange. Like writing off all smart phones without investigating the iPhone. One could do it but you would not expect many to do it. Somehow it is common for protestant Christians. As a protestant I didn't know anyone who ever read anything serious by a Catholic on why he is Catholic. It is just never seriously addressed.
The bottom line is if people took a more rational approach to religion there would be more Catholics. We could avoid this scenario that starts with fear and later is driven by despair. Instead one could read the best representatives of all the major religious schools of thought. It is not really obvious who that would be but to make a serious attempt at it is not that hard. You can start by asking a member of that faith who you respect for something that describes his religion well. It is exceedingly rare. Most people only consider religious arguments they happen to stumble into.
I wish I could say I had been more rational in my faith journey. I really wasn't. That is why I didn't become Catholic until I was 40. For a long time I just accepted the reformed tradition I was raised with. I thought I was being perfectly rational. I wasn't. I trusted the people I knew because I knew them. Even after I discovered other Christian traditions had impressive Christians in them as well it still took a long time for me to really question whether the reformed tradition was even close to the truth.