Let me frame that as questions: do you:
- Believe that we will be able to create a true AI, with self-consicousness?
- Believe that we will some day have enough energy and compute power to create a simulation that could contains billions of those consciousness?
- Believe that if we are able to do so, we will do it (aka no governmental body will prevent a simulation from happening because of ethical concerns, and if a ban happen, not all private entity will respect the ban).
If your answers to all 3 questions is YES, then you believe we likely live in a simulation. My only yes is to the question 3, because i'm cynical. The 1 is a big "i don't know", because i know enough to have no idea, and my answer to 2 is "no way" because i don't know the subject at all, but my brain think adjacent knowledge is enough to form an opinion this absolute.